35 multiple-choice questions in College Board exam style. Each has four choices and a full explanation of why each option is right or wrong.
Spot the composite. If a function is nested inside another, the chain rule applies: don't forget the inner derivative.
Attach dy/dx implicitly. Every y-term picks up a dy/dx factor; then solve for it.
Know the inverse-trig derivatives cold: arcsin → 1/√(1−x²), arctan → 1/(1+x²).
Read the explanations even when you got it right, and use correct derivative notation.