Actually this clever site drills pianists on note names and note placement on the keyboard. Kids can access this site at home for practice. Both treble and bass clef are used.

This site features a few short essays about how to sight read more effectively.

Although designed for the pianist, perhaps anyone could benefit from these practical self-reading tips.

This site is an overview of how to read music. The basics of notation such as note and rest values, the names of lines and spaces of both treble and bass clefs, etc. are covered. Includes downloadable audio files.

This site is provided for by Tomas Howie and Drumming Web. Although originally written for the drummer, any aspiring musician could benefit from the explanation of how to read music and the examples it contains. Drummers will want to...

This company produces educational materials to help you succeed in jazz improvisation and sight reading. Of note on their site is "The Art of Improvisation," a free download that guides you through the improvisational process.