Chord House ...interactive chords and scales for guitar/piano.

Free On-Line Piano Lessons - Learn to play the piano with online keyboard lesson and free piano instruction online. Free piano lessons online from basic to advanced

The Piano Education Page is a one-stop resource for teachers, students, parents of students, and fans of the piano with over 900 pages of family-friendly information,
PianoNanny - This excellent educational site is a free public service providing Free Music Lessons online.

Piano Vault is a great website for the piano student or anyone curious about piano history and information. They have chords, scales, a transposer, piano lessons, history, sheet music and much more.