I'd like more cheap, creative solutions at both ends of the curve.
How about just plain old teaching? At our *hopefully* new school, the teachers were stunned that my K DS was not allowed to move up for reading and math at his current school. One teacher put it really well "Why would I want to reinvent the wheel when the 2nd grade teacher already knows how to teach that?"
In most cases, fluidity is pretty darned cheap! Someone else is already doing that somewhere... harnessing it is cheaper than making it new.
