Thank you all for your wisdom, which has helped calm my nerves. While I appreciate the school system trying to give a bigger picture, we think we need to take this year by year right now. (thank you aeh!) Also, AnnieQuill, we have asked him briefly and he is very excited about 4th grade math with many of the same 3rd graders he's in class with now. He doesn't really understand compacted 4/5 and we didn't get into it too much. We're just trying to focus on the fact that right now he loves math class and is doing well, so we'll continue until one of those things change.

Funny story- Today I volunteered to help his first-grade class at the school book fair. While I was helping other kids figure out if that had enough money for what they wanted, he was finished buying, read the picture book he bought, and then went to his teacher to ask if it was ok if he went upstairs to math. He didn't want to miss it. :-)