Great collaborative activity where students practice solving two step equations. Partner A works out his problems while Partner B works hers. When they have finished, they compare answers. If the same--move on, if different, they work together to review their work and find the error.
Have an odd number of students? No problem, just have 2 A Partners or 2 B partners and three students can work together,
Included are two verions so they can be used different days, and an exit ticket to assess student understanding.