I have been working with several groups of students in a couple of schools on separate PLD Numeracy contracts recently, on the same problem, the students have very weak understanding of their basic facts of number and how they are inter-related, their bonds. As a result of this, I decided that a way that the students could build their capacity and their understanding would be to create a game that tested a user on the concept I wanted the students themselves to learn. After all the best way to learn is to teach. So I have created this number bonds resource, that leads into creating a game in Scratch. I have yet to trial it, but it was fun to make.