Note Reading and Other Theory

Pop-up Piano Tool Bottom of the page.
Create Your Own Theory Practice Exercises
Online Music Flash Cards: Note reading, key signatures, intervals, triads, notes on the piano and the guitar

Rhythm Resources

Rhythm Sight Reading

emusic theory: Practice Sight Reading Rhythms

Rhythm Dictation

emusic theory: Practice Resource


Listening and Identification

Intervals

Musical Intervals Tutor: Start Learning Intervals
Musical Mind: Interval Drills
Big Ears: Interval Drills

Tricks for Singing Intervals
More Tricks for Singing Intervals

(Musical Mind: Melodic Dictation Practice)

Scales

Music Theory.net
ThinkQuest site

Chords and Common Chord Progressions

Music Theory.net
emusic theory: Practice Building Chords

Sight Singing

Learn to Sightsing
Musical Mind Solfege Practice

Sightsinging Choir Treble