JamStudio This online music factory provides education grants for teachers so that students can use the site's music mixing and songwriting tools for free.
K-12 music Provides free learning resources for music students and teachers at every level.
KIDiddles KIDiddles provides free printable sheet music and lyrics for thousands of nurseries and children's songs. The site can also be used to professionally produce original song sheets for the classroom.
Lester S. Levy Collection of Sheet Music Sheet music collection from the Milton S. Eisenhower Library of The Johns Hopkins University includes more than 29,000 pieces of sheet music that can be used in the music classroom.
Midomi Listeners can search for music using their voice. Simply sing a few bars (at least ten seconds is best) and you will find the song you're looking for.