As parent of a gift children and a 4th grader teacher in a school for only gifted children, I get him. I think he was in my class last year or any of the last four years. Your son's mind is very busy with other things, things that sometimes seem more important or have greater draw for him. Talk to the teachers! We can help him. Working together as a team is what it is all about. When he gets the same consistent message from home and school, it will connect....eventually.
Talk to him about what is going on before you do anything. Get him to articulate what is happening when he is working on something and heads off in a different direction. Help him find the words for what happens to him and his plans. Help him have some ownership of who he is and understand he can take control.
I had one little guy who I gave a small note book and small pencil to carry around. When he has a brain storm of an idea or question he isn't sure relates to anything the class is discussing (his goal was on-topic discussion comments/questions), he wrote it down and checked in with me at the next opportunity. His great ideas weren't lost and he had a change to share them, feel they were valuable. Sometimes he shared them with class. He learned to say, "When we were discussing (a point of discussion fits here), I had this idea. (Share idea here.)... This often led to other great discussions in class and the other students could see he was engaged to the discussion (not just trying to throw the class off topic...something they believed he did.), so they were more eager to listen to his tangental thoughts and discuss them.
Think seriously about what you want and how to accomplish it. Small goals that are attainable and will generate success. Help him put systems in place that make him successful. For example, if he does his school work, but it gets lost from place he did it to school, give him a consistent place to do school work and a method for storing his work, folder or binder. Help him generate a check list of things to accomplish with each assignment....name, date, assignment name (list were they go on the paper), complete work, check work, put work in Homework Folder, put folder in backpack, etc. Give him a sheet to look at, post it in his work place.
At school, I have used a chart to help the child (my students and my own child) focus on key tasks, behaviors we want changed in the classroom. For example, if I want him to listen to the directions the first time, I have him repeat the directions back to a me or my TA. If I want him to get started on his work, I put a goal of getting started with out a reminder and watch to see that he does it. I set a time limit on getting started and if he isn't started in that time, he gets a reminder. If there is a desire for him to finish work on time, I say complete work assigned by teacher and I don't give him the entire assignment (I give him many smaller assignments, eventually building to the full assignment). He could earn many points/checks here with each assignment.
Each time he does these things correctly, he gets a check, which in our home translates into marbles and marbles by fun stuff...sleepovers, trip to park, playdate, watch a movie outside, new art supplies, trip to Littlest Petshop aisle in store for one toy. (each point is worth $0.25 and 1/3 of total marbles may be spent at store...1/3 for future/rainy day and 1/3 for college..these are turned into cash and put in bank.)
As school, I start out assessing these behaviors and quickly move to child assessing and conferencing with me. He puts his marks down and I put mine. I confirm places where we agree and then we discuss places where we disagree. We come to a common understanding about those. The sheet goes home.
At home we use the same system. I don't nag on the neg. I just praise the positive. When my daughter gets her work done, she gets to enjoy lots of fun things. Yesterday she was invited to go to the park to shoot off these loud balloons, the pool, and Jungle Island, but her work wasn't done (toys EVERYWHERE in the house and finish a thank you letter) so I said,"She can't come now. When she gets her work done she can go." She made it to Jungle Island for an hour and a half. She did her work and then she could go.
Communication is the key,
Stephanie