Sophie Tutor opens an interactive AP Calculus lesson next to the chat. Each lesson moves one step at a time: an animation shows the idea, a short text explains it, and multiple-choice questions check understanding. A wrong answer explains the mistake and lets the student try again; a right answer shows why it is right. At the end, the student sees a short summary and a score. Lessons cover AP Calculus AB and BC topics: limits and continuity, average and instantaneous rates of change, derivatives from the definition, the product rule, the chain rule, higher derivatives, L’Hôpital’s rule, optimization, u-substitution, definite integrals on a calculator, differential equations from word problems, and area in polar coordinates. It is for high-school students who take AP Calculus, and for anyone who wants to review a calculus topic visually. Sophie Tutor only opens a lesson when one matches the topic; for other topics, ChatGPT helps as usual. It needs no account and collects no personal information.
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