Is there a computer available in class? Lots of individualized options that way at least. Also, there would be a good chance that there aren't sufficient level books in the classroom. Make sure the library is lenient with him on non-grade level selections. Send some books in to school with him.
If he can get even a few minutes of individualized attention a day while other students are doing other work, that made a big difference with DS in K. But basically occupying a seat with zero instruction always seems a sad state to me.
