Want help identifying and understanding the differences between major models and strategies? 

✔ Understand the difference between models and strategies.  See different models represent the same strategy, and examples of different strategies solving the same problem. 

✔ A card sort for each of the 4 major operations.  There's a card sort for addition, subtraction, multiplication, and division.

✔ Easily Printable.  Simply print the pages, cut and sort the cards into sets, hand out sets to participants.