Ds6 had/has this problem -- he was in public K last year, now in private gifted school and accelerated to third for math and language arts. In LA lately, he's been refusing to write when asked, and not doing classwork -- and then telling his teacher she doesn't need to check his work because he really did do it.
We have a Behavior Notebook that ds takes with him to school if he's having a rough patch in any particular class. The teacher writes a one-sentence summary of his class every day -- if he was on task, disruptive, etc. Once that notebook starts going to school, ds knows he's in for it and that we are monitoring his behavior, and he shapes up *very* quickly -- he's very conscious of his pride. It wouldn't work for all kids, but ds does much, much better if he knows Mom and Dad are expecting a daily report.
