I would be less concerned about doing the 7th grade math now -- it sounds like he can probably handle the gaps -- and more concerned about having him repeat the same exact stuff in the fall. We had an issue with that when my son was younger, and it was sooooooo frustrating for him to have to repeat stuff he had just done the previous spring. I liked puffin's suggestion - maybe he can do something like programming for the next 3 months?