Task:  Correctly solve the problems.

Cooperative:  The mutual goal is to ensure that both pair members understand the strategies and procedures required to solve the problems correctly.  Two roles are assigned:  Explainer (explains step-by-step how to solve the problem) and accuracy checker (verifies that the explanation is accurate, encourages and provides coaching if needed).  The two roles are rotated after each problem.

Procedure:  Assign students to pairs.  Assign each pair to a foursome.  Implement the following procedure:

1.  Person A reads the problem and explains step-by-step the procedures and strategies required to solve it.  Person B checks the accuracy of the solution and provides encouragement and coaching if it is needed.

2.  Person B solves the second problem, describing step-by-step the procedures and strategies required to solve it.  Person A checks the accuracy of the solution and provides encouragement and coaching if it is needed.

3.  When two problems are completed, the pair checks their answers with another pair.  If they do not agree, they resolve the problem until there is consensus about the answer.  If they do agree, they thank each other and continue to work in their pairs.

4.  The procedure continues until all problems are completed.

Individual Accountability:  One member will be picked randomly to explain how to solve a randomly selected problem.