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.
For minor scales, know which degrees change. Harmonic minor raises 7; melodic minor raises 6 and 7 ascending only. The key signature stays that of the relative major.
Name intervals in two steps. Count letter names for size, then half steps for quality. Remember only 4ths, 5ths, 8ves (and unisons) can be "perfect."
Relative vs. parallel is a favorite trap. Relative keys share a signature; parallel keys share a tonic. Read the question carefully.
Read the explanations even when you're right. Each one reinforces a fact that often returns in a different form on the exam.