Exam hub · United States
AP free-response, explained on a board.
Built for US high-school STEM: watch derivatives, circuits and stoichiometry taught in clear English video lessons.
What students clear for AP
AP Calculus AB/BC
Limits, derivatives, integrals, series as asked.
AP Physics 1/2/C
Mechanics, E&M numericals with diagrams.
AP Chemistry
Stoichiometry, equilibrium, electrochemistry FRQs.
Worksheet photos
Upload phone photos of tonight’s homework.
Unit review
Replay lessons before AP classroom quizzes.
College prep
Bridge AP calculus into first-year university work.
FAQ
Does it match College Board mark schemes?
It teaches STEM method and reasoning in English. Always cross-check against your teacher’s rubric and official practice.
Can international students taking AP use it?
Yes. English narration is the default — useful for AP candidates worldwide.
More curricula worldwide
Clear your next AP doubt
Upload a photo or paste the question — get a step-by-step whiteboard video in English or another supported language.