Math groups consist of four students who are members of the same team for four weeks. All in-class work, with the exception of required assessments, is done in teams. Students have a primary partner in this team but also draw on all members for support. Each student is responsible for making sure all team members have done the work correctly and have an understanding of the math. Assessments can be based on one randomly chosen group member's oral or written response. Each team member receives the assessed student's score, thus ensuring each member is invested in the whole team's understanding.