Finding good, free media to use legally in school projects can be difficult. One strategy is to look for media tagged with a
Creative Commons license. There are several flavors of CC licenses, but any should suffice for school projects. All require you attribute the owner. The movie below gives you some good ideas. The links below that can help you research the matter more fully. Always read carefully for conditions.
Click here to see a full-sized version of the movie or click in the movie window to play it at that size.
General (mostly images)
Strictly Free Music
Free Sound Effects