I kept having teachers ask for a progression of how students learn and practice addition and subtraction that they could use in guided math similar to the strategy cards they use in guided reading like "say it slowly," "look for chunks," etc. These cards are the beginning of that effort. I will be adding more as I make them, but for now you will get:Tools for Addition, Addition Strategies to 5, Addition Strategies to 10, Addition Strategies to 20, Subtraction Strategies.