I thought the foundation classes were great.
I took a UBBRC 'Ultimate Bike Bounding Riding Course' in Sedalia, MO.
Here are some videos from my HERO helmet cam.
UBBRC
Circle Swerve practice
http://www.youtube.com/watch?v=I0_0nvNkIj4&feature=plcp
UBBRC
Another zig zag in a box Exercise
http://www.youtube.com/watch?v=Rsxt2VRf27c&feature=plcp