This activity was used to review the three methods for solving systems of equations (graphing, substitution, and elimination). Students were separated into 3 groups A, B, C. Group A worked on the problems in Column A, Group B worked on column B, and group C worked on colum C. After each group had finished, they formed trios to check their answers. (One person from A, one person from B, and one person from C) The key here was that each group member should've gotten the same answer in every row of problems, but each group used a different method to solve it.
This worked well for differentiation; if one member of the trio didn't get the same answer, for example, then the three students looked at the problem together to try to find the mistake!`
Answer key is now included!!