Ski Cooper is the best and cheapest place to learn I think.
+ if your kids need a break and you want some more extreme runs hit the Cat on Chicago Ridge
I agree...Ski Cooper....I took my kids ages 7, 5, and 3 there this past April...got the 2 youngest lessons and everyone had a ball. Also, nothing like just rolling right up to the lodge and parking without forking out at least 20 bucks for parking...the cheap lessons and lift tickets are nice also. Some slower lifts, but who cares, your riding with your kids having fun.
Fun drive as well