Video lectures, with supporting materials (indented items)
Topic 1: Pitch and Pitch Notation
Topic 2: Major Scales and Keys
Topic 3: Intervals
Topic 4: Minor Scales and Keys
Topic 5: Triads
Topic 6: Seventh Chords
Excellent worksheets, with answer keys, can be found on Gene Biringer's music theory website.
Note for CMU students and other fixed-do users: when doing worksheets on scale degrees, disregard the exercises that use solfege syllables.
To find a theory tutor at CMU, consult this page.