aeh- thank you for your input and experience. I agree whole-heartily that I don't want to place him in a class where he may be able to keep his head above water. I want him to be comfortable, confident, but still learning some new material. Thank you also for encouraging me to follow my "gut". I understand that the MAP-M would give us more information, but I think we're trying to make this decision before the next testing window.

ashley- True, it's not our only chance for acceleration. There's actually an option for all students in 3rd grade to test into a compacted curriculum for 4th &5th, which covers 4th-6th grade in two years, so that they're ready for pre-algebra in 7th grade. That may be an option for us as well. I could certainly send in a packet of work for him to do during his extra 30 minutes in homeroom, but the school seems open to letting him use a computer for a more systematic approach, but I'm not sure what to suggest.