DS is 5.5yo and seems to have a good grasp of math concepts. He can easily add numbers from 1-10 in his head and recently figured out that 50+50= 100 beause it is basically the same as 5+5=10, etc... Last night DH was discussing something with him and they were doing some easy multiplication (2's and 10's) and DS was enjoying that. He also loves patterns.

He is going into grade 1 next year and his K teacher has some concerns about his ability to sit still for any length of time. At the moment in K, she allows him to move around in the classroom because he is not disruptive and says he listens and retains pretty much everything she says. She suggested that over the summer we work with him on sitting and either writing or doing workbooks, or something that will require him to sit and concentrate so he can get used to sitting at a desk.

Since he enjoys math, I was thinking that would be a good place to start because if he is interested in something there is more of a chance that he will follow through. Any suggestions for a math workbook or activity ideas I can do with him?