Students will work in partners to complete this activity. Partner A will solve 10 equations with variables on both sides from their column, while Partner B will do the same in the other column. The problems for Partner A and Partner B are different, but the answers are the same. As students complete problems, they will check with their partner to make sure they got the same answer. If not, students can swap papers and find the other's mistakes. This activity provides a self check for your students, and requires them to analyze other work for error analysis. Enjoy this no prep lesson!