While all the stuff below is great, you should be using my comprehensive tutorials about photosynthesis.

1. Light Reactions 1 (the big picture: 1) the light reactions v. the Calvin cycle, 2) the structure of a chloroplast (thylakoids and stroma), 3) chlorophyll, and 4) action spectrum v. absorption spectrum.

2. Light Reactions 2 (How non-cyclic electron flow and makes ATP)

3. Light Reactions 3 (Making Oxygen and NADPH; Cyclic Electron Flow)