Children's Music Web has a wealth of information to get children interested in music.
Check out the Education Online site for music in the classroom. There are ideas for every month.
K-12 Resources for Music Educators has a great deal of information to help with music in the classrooms.
MoJo's Musical Mouseum is an interesting site to add musical ideas to your classroom.
New York Philharmonic Kidzone lets you experiment with interactive instruments, compose music, create instruments online or for-real offliine, as well as find out about composers and musicians.
Need help learning to Read Music? Check out this site.
This Song for Children's web page has great resources.
Want to search the web to learn about music? The Symphony Webquest is the way to do it.
Try this Think Quest to learn about the symphony.