have you tried a reward chart, you can use it for homework, cleaning room, setting table any chores....
Rewards don't have to cost anything either....
a friend stay over, take to park, see if anything special going on in your area....
good study habits start now
Ugh, that's stressful for everyone. Question: when are you asking him to sit down to do his homework? Maybe you can play with the timing... give him time to run around, have a good snack before doing homework. Would also suggest talking about this pattern at a time when he is rested and happy... lead with the positive: what a good job he does on his homework and his effort, then ask him why he has such a tough time getting started. I have found over the years that my kids surprise me when I take a brainstorming approach. Check out this article about dealing with homework struggles. Homework without the Fuss
is another helpful article. Best of luck. Let us know how it goes!