Just for fun or great tools for your music class? Both! The following resources are fun ways to bring music into your classroom.
In Bb is a collaborative music project. Play videos simultaneously or alone. Start different videos at different times. Use music to get your creativity flowing. Check out http://inbflat.net/.
Kisstunes turns your computer keyboard into a piano keyboard. This could be a nice alternative for the school that is short on pianos, but long on laptops.
Carmen Marty and Zac Early are instructional specialists with the eMINTS National Center.