9618 · Computer Science
Computer Science
AS + A2 · 23 topics · all four papers
Paper 1 Theory
Paper 2 Problem-solving
Paper 3 Theory
Paper 4 Practical
Python lessons
Tutor
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From data representation, networking and hardware through processor fundamentals and databases to algorithms, ADTs, OOP and AI — plus a browser-based Python sandbox for Paper 4.
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9702 · Physics
Physics
AS + A2 · 25 topics · all five papers
AS Notes
A2 Notes
Tutor
Data sheet
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Kinematics, electricity, waves through fields, capacitance, oscillations, quantum, nuclear and astronomy. Math equations render as LaTeX.
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9701 · Chemistry
Chemistry
AS + A2 · 37 topics · all five papers
AS Notes
A2 Notes
Tutor
Periodic table
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From atomic structure and bonding to Hess's law, Born–Haber, transition elements and NMR. Tutor answers in English or Chinese with mechanism diagrams.
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9700 · Biology
Biology
AS + A2 · 19 topics · all five papers
AS Notes
A2 Notes
Tutor
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From cell structure and biological molecules through DNA, immunity and homeostasis to inheritance, evolution and genetic technology.
Open Biology →