The leaps thought is so true. We have not done a lot of math at home per se. So kindergarten was really ds5 first introduction. Yet, he could count, had number sense, measurement- things like that. (His group did start addition/ subtraction in the fall.) Now, class is working on +/- to = 5 with numbers 0-5. He woke Saturday (4 days after new topic introduced) and started rattling off how to +/- to get to 50. When I asked if he was learning this at school, he said, "No, just thinking about it." So funny how they take the idea and run with it. The problem for ds is now his class will work on this for 5 more weeks.