Students will work in groups to chart 10 trials of one person dropping a ruler for another to catch. This performance task provides students with cooperative group experience that includes independent reflection or questioning as follow-up. The task consists of a teacher direction sheet with sample performance criteria or exemplary responses and student activity sheets.

When students are engaged in the performance tasks they should follow this basic format:
• The teacher introduces the task.
• The students work in cooperative learning groups.
• The students complete the independent activities.
• Several groups/students share responses.
• The class evaluates the shared responses.
Students should discuss ways to improve inferior responses and positive points of good responses. Teachers can use the performance criteria provided in the direction sheet to guide the discussion, if necessary.