It's been difficult because the problem is two-fold. He gets the correct answer without showing his work (and the wrong answer when I ask him to go back and set the problem up in writing). This typically happens with math calculation.
*Or* he makes careless errors (typically word problems) when he tries to do them in his head.
I think it's age related- I will try the graph paper and a sticker. He is still seven after all- I need to keep that in mind.
School is another matter- he is doing Montessori math at school. It's pretty far below his ability, but it's active (so he enjoys it) and I have to say, his math calculations skills have become even stronger which is hard to fathom.
