Royalty Free Music

Here's a few sources for "royalty free" music to use as background music for your tutorials if you so desire. I've had plenty of feedback from students and teachers that they like having the background music in there. Some of these sites have free music downloads, others you have to pay for:

http://incompetech.com/m/c/royalty-free/

http://www.royaltyfreemusic.com/free-music-resources.html

http://www.stockmusic.net/

http://www.musicbakery.com/