Hi CAmom,
I will be doing the same thing come Sept when we put DS in public, assuming he is not learning anyting.
We can't sit by and let their brains be wasted either.
I don't think there is any harm in doing some appropriate work after school. We banned video games completely during the week, we even got rid of the WII. The computer is better I think, will still let him have the NintendoDS but only on weekends. I hate that thing then he wants it all day.