Answers should be written on the back of the cards. Give examples and non-examples. Each team receives to tangram sets. The team equally divides the pieces among the members. The teacher hands out worksheet with problems to be solved.
Members solve problems by sharing pieces of tangram with one another.
When a solution is found, have the Team Leader ask the teacher to check the results. Worksheet Make four congruent squares. Page of 25 math problems per child. Each child does one row of problems without the calculator. The timekeeper times the group for two minutes.