Pianomouse.com is an excellent music theory program for young children beginning their piano development.
Beethoven Lives Upstairs, Classical Kids CDs.
Sue Hammond, creator of Classical Kids, rules when it comes to accessible classical recordings for children. This CD — the story of Beethoven through the eyes of his landlady’s son — launched the series. Available online.
Ricci Adams' MusicTheory.net
Two must-have readings for teachers:, Children: the Challenge, byRudolf Dreikurs. A comprehensive, effective, respectful way of understanding and working with children, and The Montessori Method, by Maria Montessori.
Laura Klein, Teacher of the Alexander Technique.