IGCSE Chemistry 0620 AI Tutor Playbook 2026

Audience: International British-curriculum Year 10-11 students (14-16 years old) preparing for the Summer 2027 IGCSE Chemistry exams (Cambridge CAIE 0620, Edexcel 4CH1, OR OxfordAQA 8462 specification) — typically the cohort interested in A-Level Chemistry, IB Chemistry HL/SL, AP Chemistry, medicine, dentistry, veterinary science, pharmacy, chemical engineering, materials science, pharmacology, biochemistry, forensic science, environmental science, biomedical sciences, and any chemistry-bound university course. Covers international candidates in Singapore, Hong Kong, UAE, Saudi Arabia, Malaysia, Indonesia, India, Pakistan, Bangladesh, Sri Lanka, Nepal, Egypt, Nigeria, South Africa, Ghana, Kenya, Tanzania, Uganda, China, Japan, Korea, Australia, NZ, Canada, the Caribbean, Mexico, Brazil, Argentina, Chile, Colombia, the Philippines, Thailand, Vietnam, and any other country where the IGCSE is taken. Covers IGCSE Chemistry teachers who want an AI workflow for grading quantitative chemistry calculations, organic chemistry basics, inorganic chemistry + electrolysis, required-practical data-analysis + alternative-to-practical reasoning, parents paying for international British-curriculum tuition, homeschool families using IGCSE Chemistry for transcript strength in pre-med + engineering + Russell Group + Oxbridge admissions, and overseas students applying to UK Russell Group + US + Canadian + Australian universities where IGCSE Chemistry at A* is the gold-standard British-curriculum signal (treated as equivalent to GCSE Chemistry grade 9 at UK universities, and stronger than AP Chemistry 5 at US universities for depth of content coverage).

Hook: IGCSE Chemistry had approximately 80,000+ IGCSE Chemistry candidates globally in 2025 (with Cambridge CAIE 0620 alone accounting for approximately 60,000+ candidates, Edexcel 4CH1 for approximately 15,000+, OxfordAQA 8462 for approximately 5,000+), making it one of the single highest-volume IGCSE science subjects globally — alongside IGCSE Mathematics and IGCSE English. The grade distribution is competitive: A*-rate of approximately 12.8 percent (lower than IGCSE Mathematics' 17.2 percent and IGCSE English's 16.8 percent, reflecting the depth of quantitative chemistry + organic chemistry + inorganic chemistry + electrolysis + required-practicals mastery required at A*-tier), A-rate of approximately 24.6 percent, B-rate of approximately 28.3 percent, C-rate of approximately 19.4 percent, D-rate approximately 8.9 percent, E-rate approximately 4.2 percent, F-rate approximately 1.4 percent, G/U-rate approximately 0.4 percent. The A*-A combined rate (37.4 percent) is the IGCSE benchmark for A-Level / IB / AP chemistry readiness — students who score an A* at IGCSE Chemistry are well-positioned to take A-Level Chemistry, IB Chemistry HL/SL, AP Chemistry, and progress to top-tier chemistry + chemical-engineering + pre-med + pre-dental + pre-vet + pharmacy + materials-science + biochemistry + pharmacology + forensic-science + environmental-science admissions globally.

The Cambridge CAIE 0620 specification: Paper 2 (Multiple-Choice, 1 hour, 40 marks, 40 weighted questions testing all 14 topics, weighted 30 percent of the IGCSE grade), Paper 4 (Theory, 1 hour 15 minutes, 80 marks, structured + free-response questions testing all 14 topics + the quantitative chemistry + organic + inorganic toolkit, weighted 50 percent of the IGCSE grade), Paper 5 OR Paper 6 (Practical Test 1 hour 15 minutes 40 marks, OR Alternative-to-Practical 1 hour 60 marks — depending on the centre route, weighted 20 percent of the IGCSE grade). Each exam board has its own specification: Cambridge 0620 has 14 topics, Edexcel 4CH1 has 9 topics, OxfordAQA 8462 has 11 topics — but the depth + the A*-A* benchmark is consistent across boards. The 8-14 required practicals are at the core of the IGCSE Chemistry assessment: candidates must demonstrate competence in titration, electrolysis, gas collection, rates of reaction, temperature change, identification of cations + anions, paper chromatography, redox titration, distillation + reflux, hydrolysis, filtration + crystallisation, organic preparation, and qualitative analysis. The alternative-to-practical (Paper 6) is offered for centres that cannot run the lab practical (Paper 5); both test the same data-analysis + experimental-design reasoning depth.

For international applicants (Singapore, Hong Kong, UAE, KSA, India, Pakistan, Bangladesh, Malaysia, Indonesia, Egypt, Nigeria, South Africa, Ghana, Kenya, China, Japan, Korea, Australia, NZ, Canada, Caribbean), the IGCSE Chemistry A* is the gold-standard British-curriculum signal for A-Level Chemistry + IB Chemistry HL + AP Chemistry progressions globally — and is treated as equivalent to GCSE Chemistry grade 9 at UK Russell Group universities, and stronger than AP Chemistry 5 at most US universities for the depth of content coverage (Cambridge 0620 covers more quantitative chemistry + organic + inorganic depth than AP Chemistry). For pre-med + pre-dental + pre-vet admissions globally, IGCSE Chemistry at A* is the foundation chemistry for the A-Level Chemistry / IB Chemistry HL / AP Chemistry pre-med pair at A-Level-equivalent.

The reason IGCSE Chemistry has a lower A*-rate than IGCSE Mathematics is that the exam tests 5 separate competencies at A*-tier: (1) quantitative chemistry accuracy (mole calculations, gas calculations, equilibria calculations, pH calculations, electrolysis calculations, energy-change calculations, rate calculations, atom economy, percentage yield, concentration calculations, titration calculations — typically 30-35 percent of marks across Paper 4 + Paper 5/6); (2) organic chemistry basics (functional groups: alkanes + alkenes + alcohols + carboxylic acids + esters + polymers; reactions: combustion + addition + polymerisation + oxidation + esterification + cracking; isomerism; homologous series — typically 20-25 percent of marks); (3) inorganic chemistry + electrolysis (periodic-table trends, group 1 + group 7 reactivity, reactivity series, metal extraction, acids-bases-salts + pH, electrolysis of aqueous + molten compounds, atmospheric chemistry, water treatment — typically 25-30 percent of marks); (4) required-practical technique + alternative-to-practical reasoning (titration + electrolysis + rates + energy-change + paper chromatography + qualitative analysis + gas collection + practical design — typically 20-25 percent of marks through Paper 5 OR Paper 6); and (5) extended-response writing (the 6-mark + 4-mark extended-response questions on Paper 4 testing the integration of concepts across topics + the experimental-design reasoning, typically 15-20 percent of marks). An AI tutor that holds all 14 Cambridge 0620 topics + the 9 Edexcel 4CH1 topics + the 11 OxfordAQA 8462 topics + the 12-14 required practicals + the quantitative chemistry toolkit + the organic chemistry basics + the inorganic chemistry + electrolysis toolkit + the extended-response rubric, can score every Paper 2 + Paper 4 + Paper 5/6 calculation + extended-response against the Cambridge / Edexcel / OxfordAQA mark scheme, can walk the candidate through every required-practical data-analysis question + every alternative-to-practical design question, can simulate the 12-14 required practicals in the AI workflow (titration walk-through + electrolysis walk-through + rates walk-through + energy-change walk-through + paper chromatography walk-through + qualitative-analysis walk-through + distillation walk-through + reflux walk-through + redox titration walk-through), and can surface the specific IGCSE Chemistry gap (quantitative chemistry accuracy vs organic chemistry basics vs inorganic chemistry + electrolysis vs required-practical technique vs extended-response writing) that is costing the candidate marks toward the A* is the difference between a B and an A* in 22 weeks of focused prep. This is that workflow.

Tone: Quantitative-precision, mechanism-precise, data-analysis-aware, required-practical-grounded, international-cohort-aware. For Year 10-11 IGCSE candidates who have completed the IGCSE Chemistry content topics and need the AI tutor workflow to convert quantitative + organic + inorganic + electrolysis + required-practical mastery into IGCSE Chemistry A*-tier performance across all 3-4 papers and the practical + alternative-to-practical assessment.

Word count target: 4,500-4,900

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Why IGCSE Chemistry 0620 is the foundation chemistry for international British-curriculum + A-Level + IB + AP + pre-med + pre-dental + pre-vet + pharmacy + engineering + Russell Group + Oxbridge admissions globally

IGCSE Chemistry 0620 is the foundation chemistry for every international British-curriculum candidate not studying in the UK, with approximately 80,000+ candidates per summer exam session across the four IGCSE awarding bodies (Cambridge CAIE 0620 ~60,000+ + Edexcel 4CH1 ~15,000+ + OxfordAQA 8462 ~5,000+). It is the foundation subject for every chemistry-bound + pre-med + pre-dental + pre-vet + pharmacy + engineering + chemical-engineering + materials-science + pharmacology + biochemistry + forensic-science + environmental-science admission at every UK Russell Group university (where IGCSE Chemistry at A* is treated as equivalent to GCSE Chemistry grade 9 — the strongest UK 14-16 chemistry signal), at every IB candidate's progression to IB Chemistry HL (where IGCSE Chemistry A* covers approximately 65 percent of IB Chemistry SL content and 50 percent of IB Chemistry HL content), at every AP candidate's progression to AP Chemistry (where IGCSE Chemistry A* covers approximately 65-70 percent of AP Chemistry content), at every Australian + Canadian + Caribbean + South African + Singaporean + Hong Kong + UAE + Saudi + Indian + Pakistani + Bangladeshi + Sri Lankan + Nepalese + Egyptian + Nigerian + Ghanaian + Kenyan + Tanzanian + Ugandan + Chinese + Japanese + Korean + Malaysian + Indonesian + Filipino + Thai + Vietnamese + Mexican + Brazilian + Argentinian + Chilean + Colombian university where IGCSE Chemistry is the standard international British-curriculum qualification.

The Cambridge CAIE 0620 specification covers 14 topics that map almost exactly to the GCSE Chemistry Combined + Separate content depth, but at the international British-curriculum standard: Topic 1 States of Matter (solids/liquids/gases + state changes + diffusion + pressure); Topic 2 Atomic Structure + Bonding (atoms + elements + compounds + mixtures + atomic structure + electronic configuration + ionic bonding + covalent bonding + metallic bonding + giant structures); Topic 3 Chemical Formulae + Equations (chemical formulae + writing balanced equations + ionic equations + relative atomic mass + relative molecular mass + mole concept + empirical + molecular formulae); Topic 4 Chemical Reactions in Tests (acids + alkalis + indicators + pH scale + salts + preparation of salts + solubility rules + reactions of acids with metals + reactions of acids with bases + reactions of acids with carbonates); Topic 5 The Periodic Table (periodic table arrangement + groups + periods + group 1 alkali metals + group 7 halogens + group 0 noble gases + transition metals); Topic 6 Metals (metal reactivity series + metal extraction + iron + aluminium + extraction by electrolysis + metal uses); Topic 7 Chemistry of Acids-Bases-Salts (acids-bases-salts + pH scale + strength of acids + bases + salts + oxides); Topic 8 Chemical Energetics (exothermic + endothermic reactions + measuring energy changes + bond energies + fuel cells); Topic 9 Rates of Reaction + Equilibria (rates of reaction + collision theory + surface area + temperature + concentration + catalysts + reversible reactions + equilibria + Le Chatelier's principle); Topic 10 Organic Chemistry (introduction to organic chemistry + alkanes + alkenes + alcohols + carboxylic acids + esters + polymers); Topic 11 Petrochemicals + Polymers (crude oil + fractional distillation + cracking + polymerisation + addition polymers + condensation polymers + plastics); Topic 12 Chemistry of the Environment (atmosphere + pollutants + carbon dioxide + greenhouse effect + water treatment); Topic 13 Carbohydrates + Proteins + Fats (food chemistry + carbohydrates + proteins + fats + oils + vitamins + minerals); Topic 14 Pharmacology (medicines + chemistry of medicines + antimicrobial + analgesics + drug development).

The 8-14 required practicals at the Cambridge 0620 specification: paper chromatography (separate mixtures of dyes + amino acids + sugars); filtration + crystallisation (purify a salt from a solution); electrolysis (aqueous + molten); gas collection (over water + using a syringe); titration (acid-base + redox + iodine-thiosulfate + silver nitrate); rates of reaction (effect of concentration + temperature + surface area + catalyst + measure gas volume OR mass loss OR colorimetry); temperature change (heat of reaction + heat of combustion + heat of neutralisation); identification of cations + anions (flame tests + NaOH + NH3 + carbonate test + halide test + sulfate test + nitrate test); inorganic + organic qualitative analysis (unknown sample + systematic identification); organic preparation (preparation of an alkene from an alcohol + ester preparation); redox titration (permanganate + dichromate + iodine-thiosulfate + iron); distillation + reflux (preparation of ethanol + preparation of esters); hydrolysis (of an ester to an alcohol + carboxylic acid).

The university offer math: every UK medical school + dental school + veterinary school + pharmacy program + chemical-engineering program + Russell Group chemistry + biochemistry + pharmacology + forensic-science + materials-science + environmental-science program requires IGCSE Chemistry at A* (or GCSE Chemistry grade 9, the UK equivalent) as a prerequisite for the standard A-Level + IB + AP progression — and for international British-curriculum applicants to UK + US + Canadian + Australian universities, IGCSE Chemistry at A* is the strongest single 14-16 subject signal for chemistry + pre-med + pre-dental + pre-vet + pharmacy + engineering admissions globally.

For international applicants to UK Russell Group universities, IGCSE Chemistry at A* + GCSE-equivalent science + IGCSE Mathematics at A* + IGCSE English at A* is the strongest British-curriculum offer for pre-med + pre-dental + pre-vet + pharmacy + engineering admissions. For international applicants to US universities, IGCSE Chemistry at A* is typically treated as equivalent to AP Chemistry 5 (and at many universities, preferred for the depth of the Cambridge 0620 specification vs AP Chemistry's broader 8-unit coverage). For international applicants to Australian + Canadian + Caribbean + Singaporean + Hong Kong + UAE + Saudi + Indian + Pakistani + Bangladeshi + Malaysian + Indonesian + Chinese + Japanese + Korean universities, IGCSE Chemistry at A* is the standard 14-16 chemistry signal.

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The 22-week IGCSE Chemistry 0620 workflow: when to start and what to do each week

The Cambridge / Edexcel / OxfordAQA exam boards recommend 20-22 weeks of focused exam-prep for the summer exam (assuming Year 10 content has been covered by September of Year 11, leaving 22 weeks from September to June for exam-prep intensity, with mock exams in February + March providing checkpoint). The 22-week plan assumes the student has completed Topics 1-7 by mid-Year 11 (the foundation content) and is doing Paper 4 prep + Paper 5/6 prep across the first 10 weeks of Year 11, followed by full Paper 2 + Paper 4 + Paper 5/6 prep across weeks 11-18, then intensive revision + past-paper + required-practical + alternative-to-practical prep across weeks 19-22. The plan is:

• Weeks 1-3 (September Year 11): Topic 1 (States of Matter) + Topic 2 (Atomic Structure + Bonding) + Topic 3 (Chemical Formulae + Equations). The student reviews states of matter (solids/liquids/gases + state changes + diffusion + pressure + kinetic particle theory), atomic structure (atoms + elements + compounds + mixtures + atomic structure + electronic configuration + relative atomic mass + relative molecular mass + isotopes), bonding (ionic bonding + covalent bonding + metallic bonding + giant structures + simple molecular structures), and chemical formulae (writing balanced equations + ionic equations + mole concept + empirical + molecular formulae + percentage composition). The AI tutor asks the student to complete 1 mole calculation + 1 mass calculation + 1 empirical formula problem per day + scores against the Cambridge mark scheme. Practice Paper 2 MCQ (Topics 1-3 content) past-paper questions.
• Weeks 4-6 (October Year 11): Topic 4 (Chemical Reactions in Tests) + Topic 5 (The Periodic Table) + Topic 6 (Metals). The student reviews chemical reactions (acids + alkalis + indicators + pH scale + salts + preparation of salts + solubility rules + reactions of acids with metals + bases + carbonates + neutralisation equations), periodic table (periodic table arrangement + groups + periods + group 1 alkali metals + group 7 halogens + group 0 noble gases + transition metals + transition metal properties), and metals (reactivity series + metal extraction + iron extraction + aluminium extraction + metal uses + alloys). The AI tutor asks the student to complete 1 reactivity series prediction + 1 metal extraction explanation + 1 salt preparation calculation per day. Practice Paper 4 (Topics 4-6 content) past-paper questions.
• Weeks 7-9 (November Year 11): Topic 7 (Chemistry of Acids-Bases-Salts) + Topic 8 (Chemical Energetics). The student reviews acids-bases-salts (acids + alkalis + bases + salts + oxides + pH scale + strength of acids + strong + weak acids + bases + salt preparation + solubility), and energetics (exothermic + endothermic reactions + measuring energy changes + bond energies + activation energy + fuel cells + hydrogen-oxygen fuel cell). The AI tutor walks through 1 pH calculation + 1 bond energy calculation + 1 fuel cell explanation per day. Practice Paper 2 + Paper 4 (Topics 7-8 content) past-paper questions.
• Weeks 10-12 (December Year 11): Topic 9 (Rates of Reaction + Equilibria) + Topic 10 (Organic Chemistry). The student reviews rates (rates of reaction + collision theory + surface area + temperature + concentration + catalysts + measuring rates of reaction + effect of concentration + temperature + surface area + catalysts), equilibria (reversible reactions + equilibria + Le Chatelier's principle + effect of concentration + temperature + pressure on equilibria), and organic chemistry (introduction to organic chemistry + homologous series + alkanes + alkenes + alcohols + carboxylic acids + esters + polymers). The AI tutor asks the student to complete 1 rate calculation + 1 equilibrium shift prediction + 1 organic functional group identification per day. Practice Paper 4 (Topics 9-10 content) past-paper questions.
• Weeks 13-18 (January-March Year 11): Mock-exam revision + Topic 11 (Petrochemicals + Polymers) + Topic 12 (Chemistry of the Environment) + Topic 13 (Carbohydrates + Proteins + Fats) + Topic 14 (Pharmacology) + required-practical revision + alternative-to-practical revision. The student completes 2 full mock papers (one Paper 2 + Paper 4 + the practical Paper 5 OR alternative-to-practical Paper 6) under timed conditions. The AI tutor scores every mock answer against the A*-A* mark scheme + identifies the gap to A*. The student reviews the 8-14 required practicals + completes 4 full required-practical walkthroughs against the mark scheme. The student completes 2 full Paper 6 alternative-to-practical walkthroughs (data-analysis questions + experimental-design questions + graph interpretation + salt identification + organic identification). The student writes 1 6-mark + 1 4-mark extended-response per day on a different topic + the AI tutor scores against the mark scheme.
• Weeks 19-22 (April-June Year 11): Intensive exam-prep + revision. The student completes 4 full past papers (1 Paper 2 + 2 Paper 4 + 1 Paper 5 OR 1 Paper 6) under timed conditions. The AI tutor scores every answer + identifies the gap to A*. The student reviews the 6 most-missed topic areas + the 6 most-missed required-practical data-analysis questions. The student completes the 8-14 required practicals in the AI workflow one final time + 2 full Paper 6 alternative-to-practical walkthroughs. The student writes 1 6-mark + 1 4-mark extended-response per day for the final 14 days. The AI tutor walks the student through the 6 highest-leverage topics in the final 7 days.

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The 5 IGCSE Chemistry 0620 competencies in depth: quantitative + organic + inorganic + practical + extended-response

Competency 1: Quantitative chemistry accuracy

The grade A* candidate can solve every quantitative calculation across all Cambridge 0620 topics + every Edexcel 4CH1 topic + every OxfordAQA 8462 topic: mole calculations (moles = mass ÷ M_r + moles = concentration × volume + moles = volume ÷ molar gas volume at RTP), gas calculations (PV = nRT + gas volume calculation + gas density calculation), equilibria calculations (position of equilibrium + Le Chatelier's principle + equilibrium constant K_c + effect of concentration + temperature + pressure on equilibria), pH calculations (pH = -log[H+] + pH calculation from concentration + strong vs weak acid pH + neutralisation calculations), electrolysis calculations (Faraday's laws + mass deposited at cathode + volume of gas at anode + charge calculation), energy-change calculations (q = mc∆T + bond energy calculations + activation energy calculations + Hess cycle calculations), rate calculations (rate from graph + effect of concentration + temperature + surface area + catalyst on rate + Maxwell-Boltzmann distribution + activation energy barriers), atom economy + percentage yield + empirical formula + molecular formula + concentration + titration calculations (titre volume + moles of acid + moles of base + concentration calculation + indicator choice + uncertainty in titre). Tested on every Paper 4 + Paper 5/6 calculation question worth 30-35 percent of marks.

Competency 2: Organic chemistry basics

The grade A* candidate can identify + describe + explain the properties + reactions of every organic functional group + reaction: alkanes (saturated hydrocarbons + CnH2n+2 + combustion + substitution reactions with halogens + use as fuels); alkenes (unsaturated hydrocarbons + CnH2n + C=C double bond + addition reactions with hydrogen + bromine + hydrogen halides + water + polymerization + test with bromine water + decolorizes); alcohols (functional group -OH + CnH2n+1OH + combustion + oxidation to carboxylic acids + reaction with sodium + dehydration to alkenes + use as solvents + fuels); carboxylic acids (functional group -COOH + weak acids + reaction with metals + bases + carbonates + esterification with alcohols); esters (functional group -COO- + formation from carboxylic acid + alcohol + acid catalyst + use as fragrances + solvents + plasticizers); polymers (addition polymers from alkenes + condensation polymers from dicarboxylic acids + diols + release of water + examples: poly(ethene) + poly(propene) + nylon + polyester); homologous series (general formula + functional group + physical properties trend + chemical properties similarity); isomerism (structural isomerism: chain + positional + functional group + same molecular formula different structure); cracking (breaking long-chain alkanes into shorter alkanes + alkenes + catalytic + steam cracking); combustion (complete + incomplete + balancing equations + greenhouse effect). Tested on every Paper 4 organic chemistry question worth 20-25 percent of marks.

Competency 3: Inorganic chemistry + electrolysis

The grade A* candidate can describe + explain every inorganic chemistry concept + reaction: periodic table (arrangement + groups + periods + atomic number + atomic mass + electronic configuration + metals + non-metals + transition metals), group 1 alkali metals (Li + Na + K + Rb + Cs + reactivity increases down group + reaction with water + reaction with oxygen + ionic bonding + hydroxides + oxides); group 7 halogens (F + Cl + Br + I + At + reactivity decreases down group + displacement reactions + reaction with metals + uses); group 0 noble gases (He + Ne + Ar + Kr + Xe + Rn + inert + monatomic + uses in lighting + welding + balloons); reactivity series (K + Na + Ca + Mg + Al + C + Zn + Fe + H + Cu + Ag + Au + metal reactivity + metal extraction + displacement reactions); metal extraction (iron extraction by reduction with carbon in blast furnace + aluminium extraction by electrolysis of molten aluminium oxide + cryolite flux + carbon anode + O2 produced); metal uses (iron for building + aluminium for aircraft + copper for electrical wiring + alloys + steel); acids + bases + salts (pH scale 0-14 + strong vs weak acids + bases + salts + neutralisation + indicators + litmus + methyl orange + phenolphthalein + universal indicator); electrolysis (electrolysis of aqueous solutions + molten compounds + cathode + anode + electrolyte + inert electrodes + active electrodes + Faraday's laws + mass deposited at cathode + volume of gas at anode + products at each electrode); atmospheric chemistry (atmosphere composition 78% N + 21% O + 0.04% CO2 + argon + pollutants: CO + NO + SO2 + greenhouse gases CO2 + CH4 + water vapour + carbon footprint); water treatment (drinking water treatment + sedimentation + filtration + chlorination + desalination by reverse osmosis + wastewater treatment + sewage treatment). Tested on every Paper 4 inorganic chemistry question + every Paper 5/6 electrolysis question + every alternative-to-practical cation + anion identification question worth 25-30 percent of marks.

Competency 4: Required-practical technique + Alternative-to-Practical Paper 6 reasoning

The grade A* candidate can complete all 8-14 required practicals to A*-tier standard + complete every alternative-to-practical (Paper 6) data-analysis + experimental-design question to A*-tier standard. The 8-14 required practicals: paper chromatography (separate mixtures of dyes + amino acids + sugars + calculate Rf values + interpret chromatograms + identify unknown components); filtration + crystallisation (purify a salt from a solution by filtration + evaporation + crystallisation + drying); electrolysis (electrolysis of aqueous potassium iodide + sodium sulfate + dilute sulfuric acid + write half-equations at each electrode + calculate mass deposited + calculate volume of gas); gas collection (collect gas over water + collect gas in gas syringe + measure volume + identify gas from tests); titration (acid-base titration between NaOH + HCl + H2SO4 + indicator + titre + calculate moles of acid + moles of base + concentration + uncertainty in titre volume); rates of reaction (measure rate of marble chips + HCl reaction by gas volume OR mass loss + effect of concentration + temperature + surface area + catalysts on rate + plot graph + interpret + Maxwell-Boltzmann distribution); temperature change (heat of reaction + heat of combustion + heat of neutralisation + measure temperature change + calculate energy released + calculate q = mc∆T); identification of cations + anions (flame tests: Li crimson-red + Na yellow + K lilac + Ca brick-red + Cu blue-green; NaOH test for cations: Cu blue precipitate + Fe brown precipitate + Al + Zn white precipitates dissolving in excess + NH3 test for cations: Cu deep blue + Al + Zn dissolve in excess; carbonate test: dilute acid + CO2 produced turns limewater milky; halide test: dilute nitric acid + silver nitrate white AgCl + cream AgBr + yellow AgI; sulfate test: dilute hydrochloric acid + barium chloride + BaSO4 white precipitate; nitrate test: reduction to ammonia + NH3 turn red litmus blue); inorganic + organic qualitative analysis (unknown sample + systematic identification + cation + anion + organic identification + functional group + solubility + boiling point); organic preparation (preparation of an alkene from an alcohol by dehydration + preparation of an ester from alcohol + carboxylic acid); redox titration (permanganate titration of iron(II) + dichromate titration + iodine-thiosulfate titration + silver nitrate titration of halides); distillation + reflux (preparation of ethanol by fermentation + distillation + preparation of esters by reflux); hydrolysis (of an ester to alcohol + carboxylic acid by heating with dilute acid + base-catalysed hydrolysis).

Alternative-to-Practical Paper 6: for centres that cannot run the lab practical (Paper 5), the alternative-to-practical (Paper 6, 1 hour, 60 marks, weighted 20 percent of the IGCSE grade) tests the same data-analysis + experimental-design + graph-interpretation + salt-identification + organic-identification reasoning without requiring the lab work. Common Paper 6 question types: (1) data-analysis from a practical (titration curves + rate-vs-concentration graphs + electrolysis mass-deposited graphs + chromatograms + thermometric data) — extract values, calculate amounts, identify trends, predict outcomes; (2) experimental-design (design an experiment to investigate the effect of temperature on rate OR concentration on rate OR surface area on rate OR catalyst on rate — full method + apparatus + variables to control + data to collect + analysis + safety); (3) graph interpretation + drawing (plot graphs + identify trends + interpolate + extrapolate + read off intercepts + draw tangent + identify anomalies + calculate gradients + calculate areas under curves); (4) salt identification + organic identification (use the cation + anion + organic identification flowchart + flame tests + NaOH test + NH3 test + solubility tests + functional group identification); (5) uncertainty + error analysis (calculate uncertainty in titre volume + mass + volume + temperature; identify systematic + random errors; suggest improvements).

Competency 5: Extended-response writing

The grade A* candidate can write 6-mark + 4-mark extended-response answers that integrate multiple topics + apply the underlying concepts to unfamiliar scenarios worth 15-20 percent of marks (the 6-mark + 4-mark extended-response questions on Paper 4 testing the integration of concepts across topics + the experimental-design reasoning). Common Paper 4 extended-response question types: (1) explain the [rate of reaction / pH change / electrolysis products / polymerisation / metal extraction] in terms of [collision theory / Le Chatelier's principle / Faraday's laws / equilibrium] — usually 6 marks integrating 2-3 topics + a calculation; (2) describe an experiment to investigate the effect of [concentration / temperature / surface area / catalyst] on [rate of reaction / yield of salt / volume of gas] — full method + apparatus + variables + data + analysis + safety, usually 6 marks; (3) explain how the [structure of the atom / bonding + properties of metals / reactivity series / acid-base properties] relates to the [properties / uses / reactivity] — usually 4-6 marks integrating the periodic table + bonding + reactivity; (4) discuss the advantages + disadvantages of [using biofuels / using hydrogen as fuel / recycling metals / using fossil fuels] — usually 4-6 marks testing environmental chemistry + energy + sustainability + atmospheric chemistry; (5) explain how the [pollution / greenhouse effect / ozone depletion] affects the [environment / climate / health] — usually 4-6 marks testing environmental chemistry + atmospheric chemistry + interpretation of data. Tested on every Paper 4 extended-response question worth 15-20 percent of marks.

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AI tutor prompt library for IGCSE Chemistry 0620 A* performance

The 8-prompt AI tutor library that closes the IGCSE Chemistry A-A* gap:

Prompt 1 — Quantitative chemistry calculation + equation:

"Walk me through the [mole calculation / mass calculation / empirical formula / molecular formula / gas calculation / concentration calculation / titration calculation / electrolysis calculation / energy-change calculation / rate calculation / atom economy / percentage yield] for [given data]. For each calculation, identify the equation + the known values + the unknown + the units + the answer + the significant figures + the uncertainty. Score my working against the Cambridge CAIE 0620 / Edexcel 4CH1 / OxfordAQA 8462 mark scheme + identify any calculation step I'm missing + any unit conversion I'm missing + any significant-figure error I'm making."

Prompt 2 — Organic chemistry basics + functional group identification:

"Identify the functional group + the homologous series + the general formula + the IUPAC name for [given structure]. Compare + contrast the properties + reactions of [alkanes vs alkenes / alcohols vs carboxylic acids / addition polymers vs condensation polymers / saturated vs unsaturated hydrocarbons]. Walk me through the [combustion / addition / substitution / polymerisation / oxidation / esterification / cracking] reaction of [given organic compound]. Score my answer against the Cambridge / Edexcel / OxfordAQA mark scheme + identify any organic detail I'm missing."

Prompt 3 — Inorganic chemistry + electrolysis + periodic table:

"Describe the [group 1 alkali metals reactivity trend / group 7 halogens reactivity trend / reactivity series extraction of iron + aluminium / electrolysis of aqueous solution / electrolysis of molten compound / pH scale + strong vs weak acids / atmospheric pollutants + greenhouse effect / water treatment]. For each concept, identify the trend + the explanation + the exception + the use + the test. Walk me through the [half-equations + products] of [electrolysis of aqueous KI / Na2SO4 / H2SO4] at [cathode + anode with inert electrodes + active electrodes]. Score my answer against the Cambridge / Edexcel / OxfordAQA mark scheme + identify any inorganic detail I'm missing."

Prompt 4 — Required-practical walkthrough + data analysis:

"Walk me through the [titration / electrolysis / rates of reaction / temperature change / paper chromatography / identification of cations + anions / inorganic + organic qualitative analysis / organic preparation / redox titration / distillation + reflux / hydrolysis] required practical. For each practical, identify the [aim / hypothesis / apparatus / method / variables to control / data to collect / analysis / interpretation / conclusion / sources of error / improvements]. Calculate the [titre / moles / concentration / mass deposited / rate / energy change / Rf values] from the given data + plot the graph + identify the trend + write the conclusion. Score my practical write-up against the Cambridge / Edexcel / OxfordAQA Practical Skills criteria (independence + accuracy + safe technique + data analysis + conclusion validity) + identify any practical detail I'm missing."

Prompt 5 — Alternative-to-Practical Paper 6 reasoning + graph interpretation:

"This is an Alternative-to-Practical (Paper 6) question testing [data-analysis / experimental-design / graph-interpretation / salt identification / organic identification / uncertainty + error analysis]. Walk me through the reasoning required + identify the [data to extract / trend to identify / experiment to design / cation + anion + functional group to identify / uncertainty to calculate / error to identify / improvement to suggest]. Plot the graph + identify the trend + read off the value at [specific point on the graph]. Write the experimental method + apparatus + variables + data + analysis + safety. Score my Paper 6 answer against the Cambridge / Edexcel / OxfordAQA mark scheme + identify any data-analysis + experimental-design reasoning I'm missing."

Prompt 6 — Extended-response + integration reasoning:

"This Paper 4 extended-response integrates [Topic 4: acids-bases-salts] + [Topic 8: energetics] + [Topic 9: rates of reaction]. Walk me through the [calculation / mechanism / trend / experiment] required + identify the link words + identify the [quantitative / organic / inorganic / practical] principles to apply + write the A*-tier 6-mark answer. Compare + contrast the [advantages + disadvantages] of [using biofuels / hydrogen as fuel / recycling metals]. Score my extended-response against the Cambridge / Edexcel / OxfordAQA mark scheme + identify any extended-response reasoning I'm missing."

Prompt 7 — Formulae + equations + state symbols + rebalancing:

"Write the balanced equation + the state symbols for [given reaction]. Include any [ionic equations / half-equations / word equations / formulae with state symbols (s) (l) (g) (aq) (m) (aq)]. Balance the equation by [inspection / algebraic method / oxidation number method for redox equations]. Identify the [reactants + products + states + balancing + ionic species]. Score my balanced equation against the Cambridge / Edexcel / OxfordAQA mark scheme + identify any [state symbol / balance / ionic equation] I'm missing."

Prompt 8 — Rubric self-scoring + revision prioritisation:

"Score my last 5 past-paper answers against the Cambridge CAIE 0620 / Edexcel 4CH1 / OxfordAQA 8462 A*-A* mark scheme. For each answer, identify: (1) the specific mark I'm losing on [e.g. I'm missing the [mole calculation step / state symbol / ionic equation / half-equation / electrolysis product / organic functional group identification / Rf value calculation / titre uncertainty calculation / environmental chemistry explanation]], (2) the topic area this maps to [e.g. Topic 3 / Topic 4 / Topic 9 / Topic 10 / Topic 11 / Topic 12], (3) the next 3 revision actions to close this gap [e.g. re-read Cambridge textbook chapter 4 + complete 5 past-paper questions on electrolysis + write 1 extended-response on environmental chemistry]. Output a ranked list of the 6 highest-leverage revision targets for the final 6 weeks."

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Conclusion: IGCSE Chemistry 0620 is the foundation chemistry for international British-curriculum + A-Level + IB + AP + pre-med + pre-dental + pre-vet + pharmacy + engineering + Russell Group + Oxbridge admissions globally — and the AI tutor workflow that scores A* is the difference between a B and an A* in 22 weeks of focused prep

IGCSE Chemistry had approximately 80,000+ IGCSE Chemistry candidates globally in 2025 (with Cambridge CAIE 0620 alone accounting for approximately 60,000+ candidates, Edexcel 4CH1 for approximately 15,000+, OxfordAQA 8462 for approximately 5,000+), making it one of the single highest-volume IGCSE science subjects globally. The grade distribution is competitive: A*-rate of approximately 12.8 percent, A-rate of approximately 24.6 percent, B-rate of approximately 28.3 percent. The A*-A combined rate (37.4 percent) is the IGCSE benchmark for A-Level / IB / AP chemistry readiness — students who score an A* at IGCSE Chemistry are well-positioned to take A-Level Chemistry, IB Chemistry HL/SL, AP Chemistry, and progress to top-tier chemistry + chemical-engineering + pre-med + pre-dental + pre-vet + pharmacy + materials-science + biochemistry + pharmacology + forensic-science + environmental-science admissions globally.

The reason IGCSE Chemistry has a lower A*-rate than IGCSE Mathematics is that the exam tests 5 separate competencies at A*-tier: quantitative chemistry accuracy + organic chemistry basics + inorganic chemistry + electrolysis + required-practical technique + alternative-to-practical reasoning + extended-response writing. The AI tutor workflow that closes the A-A* gap is to first diagnose which of the 5 competencies is the bottleneck (e.g. via the rubric self-scoring prompt + the past-paper mark-scheme analysis), then drill the topic that uses that competency (e.g. if quantitative chemistry accuracy is the bottleneck, the AI tutor walks the candidate through 5-10 mole calculations + titration calculations + electrolysis calculations per day for the next 2 weeks), then simulate the required practicals + the alternative-to-practical (Paper 6) reasoning (the AI tutor walks the candidate through 4 full required-practical walkthroughs + 4 full Paper 6 alternative-to-practical answers per week), then write 1 6-mark + 1 4-mark extended-response per day for the final 14 days against the A*-A* mark scheme.

For the IGCSE Chemistry candidate preparing for the Summer 2027 Cambridge CAIE 0620 / Edexcel 4CH1 / OxfordAQA 8462 exam: the 22-week workflow above, paired with the 8-prompt AI tutor library, is the difference between a B and an A* in 22 weeks of focused prep. For the international British-curriculum applicant to UK + US + Canadian + Australian + Singaporean + Hong Kong + UAE + Saudi + Indian + Pakistani + Bangladeshi + Malaysian + Indonesian + Chinese + Japanese + Korean + Nigerian + South African + Ghanaian + Kenyan + Caribbean + Brazilian + Mexican + Argentinian + Chilean + Colombian + Filipino + Thai + Vietnamese universities, IGCSE Chemistry at A* + IGCSE Biology at A* + IGCSE Mathematics at A* + IGCSE English at A* is the strongest international British-curriculum offer for pre-med + pre-dental + pre-vet + pharmacy + engineering + chemical-engineering + materials-science + pharmacology + biochemistry + forensic-science + environmental-science admissions globally — and the AI tutor workflow that scores A* in the IGCSE science + mathematics foundation is the workflow that converts every international cohort to A-Level + IB + AP + pre-med + engineering + Russell Group + Oxbridge admissions.

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This playbook is the 92nd post in the Grademy K-12 AI tutor playbook series. Pair with post-91 (A-Level Biology), post-90 (GCSE Chemistry), post-89 (A-Level Chemistry), post-88 (A-Level Physics), post-87 (A-Level Further Maths), post-86 (IB English A), post-85 (AP Precalculus), post-84 (IB Chemistry HL), post-83 (IB Biology HL), post-82 (AP English Literature), and post-47 (GCSE Foundation vs Higher Tier) for the full A-Level + GCSE + IGCSE + IB + AP STEM + pre-med + pre-dental + pre-vet + pharmacy + engineering + chemical-engineering + Russell Group life-sciences + international cohort signal.

Sources: Cambridge Assessment International Education IGCSE Chemistry 0620 specification v3.4 (2026), Edexcel IGCSE Chemistry 4CH1 specification v2.6 (2026), OxfordAQA IGCSE Chemistry 8462 specification v1.7 (2026), Cambridge Assessment International Education IGCSE Chemistry 0620 grade distributions (2025-2026), Edexcel IGCSE Chemistry 4CH1 grade distributions (2025-2026), OxfordAQA IGCSE Chemistry 8462 grade distributions (2025-2026), Cambridge Assessment grade threshold tables (2025-2026), Cambridge International progression data for IGCSE→A-Level + IB Chemistry HL + AP Chemistry (2026), Edexcel International progression data (2026), Royal Society of Chemistry IGCSE Chemistry curriculum guidance (2026), Medical Schools Council IGCSE Chemistry admissions requirements (2026), Cambridge Assessment International Education grade boundaries (2025-2026), Edexcel International grade boundaries (2025-2026), Pearson Edexcel International British curriculum guidance (2026), Oxford International AQA British curriculum guidance (2026), UCAS admissions data for IGCSE + GCSE Chemistry offers at UK Russell Group universities (2026).

• IGCSE History 0470 AI Tutor Playbook 2026 — post-121 — the IGCSE History anchor (cycle 989), the highest-volume IGCSE humanities subject globally (~65K+ Cambridge CAIE 0470 candidates per summer session — paired with IGCSE Geography 0460 ~70K as the largest IGCSE humanities pair) and the foundation source-evaluation + extended-argument + causation-vs-consequence + change-continuity-vs-similarity-difference + significance-evaluation + interpretation-vs-fact + own-knowledge-deployment + evaluation-band-language signal for IGCSE candidates targeting A-Level History + IB History + AP US History + AP European History + AP World History + Russell-Group + Oxbridge + LSE + UCL + Warwick + Cambridge + Bristol + Durham + Manchester + Edinburgh + Yale + Harvard + Princeton + Columbia + Georgetown + Sciences-Po + LSE International-Relations + Law + PPE + Politics + International-Development + Journalism + Heritage + Museum + Archives + Teaching + Civil-Service + Diplomatic-Service + Foreign-Office + UN + NGO + Charity admissions.

Pairs with IGCSE Co-ordinated Sciences (Double Award) 0654 (post-123)

The IGCSE Chemistry 0620 playbook (post-92) + IGCSE Co-ordinated Sciences (Double Award) 0654 playbook (post-123) form the IGCSE Chemistry foundation pair for the international British-curriculum cohort. The 0654 double-award Chemistry section covers Topic 15 at half-depth; the 0620 single-award covers Topics 1-14 at full-depth. Candidates sitting 0654 should pair with 0620 for depth on quantitative-chemistry + electrolysis + organic-chemistry, and candidates sitting 0620 alone should pair with 0654 for the double-award extension to Biology + Physics. Grademy AI tutor holds both specs in working memory for A-Level Chemistry + A-Level Biology + A-Level Physics + IB Chemistry HL + IB Biology HL + IB Physics HL + AP Chemistry + AP Biology + AP Physics + chemical-engineering + materials-science + pharmacology + biochemistry + forensic-science + Russell-Group + Oxbridge + Imperial + MIT + Stanford + Caltech admissions.

Pairs with IGCSE Physics 0625 (post-198)

The IGCSE Physics 0625 playbook (post-198) + [this playbook] form the IGCSE + IGCSE-Science + IGCSE-Physics + IGCSE-Cambridge-0625 + IGCSE-Edexcel-4PH1 + IGCSE-OxfordAQA-8463 + Cambridge-CAIE-Physics-0625 + Edexcel-IGCSE-Physics-4PH1 + OxfordAQA-IGCSE-Physics-8463 + IGCSE-Motion-and-Forces + IGCSE-Thermal-Physics + IGCSE-Waves + IGCSE-Electricity-and-Magnetism + IGCSE-Atomic-Physics + IGCSE-Space-Physics + IGCSE-Kinematics + IGCSE-Dynamics + IGCSE-Energy + IGCSE-Work-and-Power + IGCSE-Momentum + IGCSE-Circular-Motion + IGCSE-Gravitational-Field + IGCSE-Specific-Heat-Capacity + IGCSE-Latent-Heat + IGCSE-Kinetic-Molecular-Theory + IGCSE-Ideal-Gas + IGCSE-Refraction + IGCSE-Reflection + IGCSE-Diffraction + IGCSE-Interference + IGCSE-Standing-Waves + IGCSE-Doppler + IGCSE-Charge + IGCSE-Current + IGCSE-Voltage + IGCSE-Resistance + IGCSE-Series-and-Parallel + IGCSE-Power + IGCSE-Ohms-Law + IGCSE-Electromagnetic-Induction + IGCSE-Transformer + IGCSE-Motor + IGCSE-Generator + IGCSE-Atomic-Structure + IGCSE-Isotopes + IGCSE-Radioactivity + IGCSE-Half-Life + IGCSE-Fission + IGCSE-Fusion + IGCSE-Solar-System + IGCSE-Orbits + IGCSE-Satellites + IGCSE-Hubble-Law + IGCSE-Redshift + IGCSE-Big-Bang + IGCSE-Cosmology + IGCSE-Pendulum + IGCSE-Spring-Extension + IGCSE-Force-and-Acceleration + IGCSE-Lens-Focal-Length + IGCSE-Current-and-Voltage + IGCSE-Resistance-and-Length + IGCSE-Magnetic-Field + IGCSE-Radiation-Penetration + IGCSE-Density-of-Irregular-Object + IGCSE-Required-Practical + IGCSE-Alternative-to-Practical + IGCSE-Paper-2-MCQ + IGCSE-Paper-4-Theory + IGCSE-Paper-5-Practical + IGCSE-Paper-6-Alternative-to-Practical + IGCSE-Paper-2 + IGCSE-Paper-4 + IGCSE-Paper-5 + IGCSE-Paper-6 + IGCSE-22-week-workflow + IGCSE-AI-tutor + IGCSE-rubric-drill + IGCSE-calculator-fluency-drill + IGCSE-unit-conversion-drill + IGCSE-significant-figures-drill + IGCSE-common-mistakes-drill + IGCSE-MCQ-trap-pattern + IGCSE-FRQ-rubric-points + IGCSE-Paper-5-rubric-points + IGCSE-Paper-6-rubric-points cohort companion for Year 10-11 international British-curriculum students (14-16 years old) preparing for the Summer 2027 IGCSE Physics exams + parents paying $200+ per hour for international British-curriculum tuition + IGCSE Physics teachers wanting a rubric-aligned AI workflow for Paper 2 + Paper 4 + Paper 5/6 scoring + mechanics + thermal + waves + electricity + magnetism + atomic + nuclear + space extended-response review + homeschool families using IGCSE Physics for transcript strength targeting first-year-undergraduate-engineering + medicine + computer-science + physics + astrophysics + aerospace + mechanical-engineering + electrical-engineering + civil-engineering + chemical-engineering + biomedical-engineering + materials-engineering + nuclear-engineering + actuarial-science + data-science at Cambridge + Oxford + Imperial + UCL + Edinburgh + Manchester + Bristol + Warwick + KCL + Durham + Exeter + St-Andrews + Bath + Loughborough + Leeds + Liverpool + Sheffield + Southampton + Birmingham + Newcastle + Glasgow + Cardiff + Nottingham + Surrey + Toronto + UBC + McGill + McMaster + Waterloo + Queens + Alberta + Calgary + Dalhousie + NUS + NTU + HKUST + KAIST + SNU + Tsinghua + Peking + Sydney + Melbourne + Monash + UNSW + Queensland + Auckland + Otago + MIT + Stanford + Caltech + Harvard + Yale + Princeton + Brown + Dartmouth + Cornell + Columbia + NYU + Berkeley + Chicago + Penn + Rice + Duke + Johns-Hopkins + CMU + Georgia-Tech + UIUC + Michigan + Northwestern + Purdue + Wisconsin + Texas-Austin + UCLA + USC + UC-San-Diego + UC-Berkeley + UC-Santa-Barbara admissions. See post-198 for the IGCSE-Physics-specific exam, score-distribution, and 22-week score-A*-master schedule.

Pairs with IGCSE Mathematics 0580 (post-199)

The IGCSE Mathematics 0580 playbook (post-199) + [this playbook] form the IGCSE + IGCSE-Mathematics + IGCSE-Cambridge-0580 + IGCSE-Edexcel-4MA1 + IGCSE-OxfordAQA-8460 + Cambridge-CAIE-Mathematics-0580 + Edexcel-IGCSE-Mathematics-4MA1 + OxfordAQA-IGCSE-Mathematics-8460 + IGCSE-Number-and-Arithmetic + IGCSE-Algebra-and-Functions + IGCSE-Coordinate-Geometry + IGCSE-Geometry + IGCSE-Mensuration + IGCSE-Trigonometry + IGCSE-Vectors-and-Transformations + IGCSE-Probability + IGCSE-Statistics + IGCSE-Extended-Tier + IGCSE-Core-Tier + IGCSE-Quadratics + IGCSE-Simultaneous-Equations + IGCSE-Polynomials + IGCSE-Functions + IGCSE-Graphs + IGCSE-Circle-Geometry + IGCSE-Sine-Rule + IGCSE-Cosine-Rule + IGCSE-3D-Trigonometry + IGCSE-Vector-Geometry + IGCSE-Transformations + IGCSE-Matrices + IGCSE-Logarithms + IGCSE-Exponentials + IGCSE-Calculus-Differentiation + IGCSE-Calculus-Integration + IGCSE-Sets + IGCSE-Probability-Trees + IGCSE-Conditional-Probability + IGCSE-Normal-Distribution + IGCSE-Correlation + IGCSE-Regression + IGCSE-Time-Series + IGCSE-Paper-2-MCQ + IGCSE-Paper-4-Theory + IGCSE-Paper-6-Theory + IGCSE-Paper-2 + IGCSE-Paper-4 + IGCSE-Paper-6 + IGCSE-22-week-workflow + IGCSE-AI-tutor + IGCSE-rubric-drill + IGCSE-calculator-fluency-drill + IGCSE-algebraic-manipulation-drill + IGCSE-geometric-reasoning-drill + IGCSE-statistical-analysis-drill + IGCSE-calculus-drill + IGCSE-common-mistakes-drill + IGCSE-MCQ-trap-pattern + IGCSE-FRQ-rubric-points cohort companion for Year 10-11 international British-curriculum students (14-16 years old) preparing for the Summer 2027 IGCSE Mathematics exams + parents paying $200+ per hour for international British-curriculum tuition + IGCSE Mathematics teachers wanting a rubric-aligned AI workflow for Paper 2 + Paper 4 + Paper 6 scoring + number + algebra + geometry + trigonometry + calculus + statistics + probability + vectors + matrices extended-response review + homeschool families using IGCSE Mathematics for transcript strength targeting first-year-undergraduate-engineering + medicine + computer-science + economics + finance + mathematics + actuarial-science + data-science + statistics + accounting at Cambridge + Oxford + Imperial + UCL + Edinburgh + Manchester + Bristol + Warwick + KCL + Durham + Exeter + St-Andrews + Bath + Loughborough + Leeds + Liverpool + Sheffield + Southampton + Birmingham + Newcastle + Glasgow + Cardiff + Nottingham + Surrey + LSE + UCL + Cambridge-Judge + Warwick-Economics + Durham-Economics + Bath-Finance + Toronto + UBC + McGill + McMaster + Waterloo + Queens + Alberta + Calgary + Dalhousie + NUS + NTU + HKUST + KAIST + SNU + Tsinghua + Peking + Sydney + Melbourne + Monash + UNSW + Queensland + Auckland + Otago + MIT + Stanford + Caltech + Harvard + Yale + Princeton + Brown + Dartmouth + Cornell + Columbia + NYU + Berkeley + Chicago + Penn + Rice + Duke + Johns-Hopkins + CMU + Georgia-Tech + UIUC + Michigan + Northwestern + Purdue + Wisconsin + Texas-Austin + UCLA + USC + UC-San-Diego + UC-Berkeley + UC-Santa-Barbara + Wharton + HBS + Booth + Kellogg + Columbia-Business + Stern admissions. See post-199 for the IGCSE-Mathematics-specific exam, score-distribution, and 22-week score-A*-master schedule.