What a goldmine! Have you looked at the tutorials on Butterscotch.com? I'm planning an iPad GarageBand project with my 5th graders at the end of the month, so I am using the tutorial for GarageBand for the iPad to help me plan it out. It's superb. It's 40 minutes long, but broken into eleven parts so you can watch a little at a time (and skip the parts you aren't interested in). I highly encourage you to check it out.