25 multiple-choice questions in College Board exam style. Each has four choices and a full explanation of why each option is right or wrong.
Build a sign chart of f′ to find increasing/decreasing and relative extrema.
Use f″ for concavity and inflection points: remember a sign change is required.
For absolute extrema, run the Candidates Test: check every critical point and both endpoints.
Read the explanations even when you got it right, and justify with the sign of the derivative.