Differentiation Strategic grouping with strong speakers Build models for students to copy Refer to models building 4.1 Molecular Models for Potato Cellular Respiration Worksheet Modifications Students may work in groups of three or four if you are short on molecule kits. Extending the Learning At the end of the Activity, have students explain the process of photosynthesis to a partner. Have the students “act out” photosynthesis by assigning them molecules using signs. Have them move around the room to represent the process by linking and unlinking hands. Have students compare the chemical reactions for combustion, cellular respiration, and photosynthesis. What do they notice about these reactions?