Hmm, if you told him no Spiderman for a bad report card, I think you gotta stick to it and reward him with something else for a good camp. He's gotta remember that he can't just suck it up for three weeks to get what he wants, he's gotta work the whole year. If you cave in, he'll figure you always will. I had a similar problem with my youngest about 1 1/2-2 years ago. She got no tv for almost two weeks because she tried to pretend she couldn't do her work and woudn't try, and we would literally sit in the kitchen at the table for 2 hours to get five minutes worth of work completed (we are both stubborn and thick headed). Anyway, I won, she learned, and my kids reward for their two great report cards was our upcoming trip to Universal.