I took a class from this group at NOVA Loudon over the weekend. Great instructors & I learned quite a bit. I highly recommend the class - especially if you're a novice or haven't had your rig very long (like me - only since February, basically). If you've been riding regular motorcycles for a while & are interested in sidecras, the early parts of the class will be a little slow, but once the exercises get going, there's plenty to keep you challenged & learning about the handling characteristics of a big rig.
The next S/TEP (sidecar/trike) classes in Loudon are at the end of June & the end of September, so check out the website if you're interested!