Here is a PowerPoint I created to easily explain photosynthesis at the high school level. Included are the topics of:
-Pigments, light, absorption (why plants are green)
-Light-dependent Reactions: Photosystems II, I, and ATP Synthase
-Light-Independent Reactions: The Calvin Cycle
There are several pictures and visuals included to give students the best understanding of how these steps work together to take carbon dioxide and water to make glucose and oxygen.