One of the concepts that I am focusing on with my students is the importance of digital citizenship. While teaching students about the importance of citing their sources, and reminding them to only use media that they have the right to use, it's important that educators make this process as easy for students as possible.
Educators/Students who visit the link http://www.royaltyfreemusic.com/free-music-clips.html must provide a live email address and complete a brief survey in order to download 30-second music clips. These clips are free to use for educational purposes, so long as the site is properly credited. I highly recommend this site!
The second site that I recommend is Freesound.org. Like the previous site, this one requires users to sign in with an email account. Freesound.org is notable because users may search for music that is licensed under Creative Commons. There is also a bookmarking feature within the site, making it easy for users to mark notable sounds for future reference.