Music Theory Lessons: Interactive lessons will help you remember concepts learned in lessons. Practice drills are included in the 'exercise' section.
Musical Mind: Especially great to practice ear training! Awesome drills that will help get you in shape for regionals & all state auditions and practice your solfege. (Plus, you'll learn your key signatures, staff & note names.)
Practice Drills: This site has drills to learn note names, keys on the piano, rhythm & ear training! Include 5 minutes a day of these drills in your practice time.