The links below are specific to Music and should be of great help when completing an assignment
National JukeboxHistorical Recordings from the Library of Congress
http://www.loc.gov/jukebox/This site contains over 10,000 recordings made by the Victor Talking Machine Company between 1901 and 1925. Each recording provides details about the record, when and where it was recorded and who composed and sang the song. This online book also includes photos and audio clips.
IMSLP/Petrucci Music Libraryhttp://imslp.org/wiki/Main_PageFree sheet music online! Petrucci Music Library is a collaborative virtual library of public domain music scores. It currently includes over 20,000 works from 3,000 composers with new works added every month. General keyword and composer name searching is available, as well as browsing by time period, genre, instrumentation and nationality.