Use this as a Checklist for each group. 

Part A: 

Cooperative groups of four should be formed with the following job assignments:  

One data recorder, two direction assistants, one presenter. 

1. The first direction assistant tells which members of the group to stand next to each other. 
2. The group decides who is taller (bigger). 
3. The recorder marks the appropriate choice. 
4. Continue steps 2, 3 and 4 until the activity sheet is complete. 

1. The second direction assistant reads the directions for part B of the activity sheet.
2. The group decides on the answer. 
3. The recorder marks the answers. 

1. Learners participate in Part C of the activity. 
2. The recorder marks the answers. 
3. The group shares the discoveries they made about size from the data they collected. 
4. The group decides how to present the data to the class. 
5. The presenter makes the presentation.