I've had trouble making my son do his summer homework lately (and when we let it fly at the beginning of the vacation, it becomes a big drama at the end of the vacation), but I think I've finally found the trick. I promised him that if he doesn't do his homework of the day in the morning, I'll have mom call me at lunchtime and I'd come and bring him to my office to do his homework here. When he realized I meant it, he started doing his homework.