Really impressive is the first time I see that board, really a wonderful strategy I wish it had existed when I was a child my math learning would have been really productive and not as frustrating as you rightly point out. Sometimes in school they make us think that math is a serious thing and that no one has fun with it but you have shown with these strategies and those in your other post that it is certainly possible to make learning math something fun. Thanks for sharing this excellent strategy. Congratulations.