Interactive
Music Theory

Music theory.net: Generic Intervals

For Students 9th - 10th
A thorough description of generic intervals with a printable chart at the end of the lesson. MusicTheory.net provides illustrated examples, and highlighted vocabulary terms. (You may need to download Flash Player to view this site.)
Interactive
Music Theory

Music theory.net: Diatonic Triads

For Students 9th - 10th
Descriptions of diatonic triads: major, natural minor, and harmonic minor. Provides animated illustrations, and a printable chart at the end of the lesson.
Interactive
Music Theory

Music theory.net: Odd Meter

For Students 9th - 10th
This site gives a brief definition of an odd meter. Use the arrows at the bottom to navigate. Provides illustrations and a printable chart.
Interactive
Music Theory

Music theory.net: Phrases and Cadences

For Students 9th - 10th
An explanation of phrases and cadences with illustrated examples. Also provides audio clips, and a printable chart at the end of the lesson. By MusicTheory.net.
Interactive
Music Theory

Music theory.com: Introduction to Chords

For Students 9th - 10th
A description of augmented and diminished triads/ chords. Provides illustrated examples with highlighted vocabulary words,a printable chart, and audio clips to supplement the lesson.
Website
Lesson Tutor

Lesson Tutor: Music and Music History

For Students 3rd - 8th
A nice resource covering many basic music theory topics. Several of the topics include printable handouts.
Website
Enchanted Learning

Enchanted Learning: Music

For Teachers Pre-K - 1st
Here is a great resource offering many free printouts to use with your classes. Worksheets covering musical instruments, music theory and more are available. All of the worksheets have printable answer sheets as well.