Instruct students to design and conduct an experiment to test their prediction. Instruct students to keep detailed lab notes. Have students set up experiments and place in the light. Make sure that they are labeled and protected from other students. Students should be allowed class time to make observations-microscopes should be available.
Students analyze data and write conclusions.
Have students clean up their entire experiment. This part of the lesson should be teacher directed discussion, where data and concepts are compared and developed. The teacher should make sure that all groups report, and the findings are written on the board. Have students evaluate their team members by giving them a score on team dynamics. Have students exchange lab notebooks, and try to evaluate their experimental set up.