Great music available for free under the Creative Commons license. Good for video productions, etc. There are all different genres available for whatever mood you wish to strike. Many classic pieces that would be suitable as a background pre-service or pre-function filler. Curated by WFMU radio station.
This little 3 minute video is a great way to introduce Copyright and Creative Commons to middle/upper graders. Simple enough to get started with how these two, CR and CC, work together for good.