Ted Gibson provides leveled music theory units with Level 1 (7th and 8th), Level 2 (9th and 10th), Level 3 (11th and 12th). There are 10 units for each Level. Choose a link, and it redirects to a Prezi on the topic. The Prezis are well-made, concise, and include clear examples. This is specifically designed for high school theory students. The Level 3 topics could serve as a good review for college theory.
