Obtain a basic understanding of photosynthesis at a chemical level. The steps involved are introduced and simplified, but they are still challenging to understand. I suggest using this resource to supplement a lecture. An overview is...

Review of reduction and oxidation opens this video. It really helps stimulate understanding of these biochemistry topics. By explaining the loss or gain of electrons, Salman Khan is able to clarify the concept of respiration processes.

Video lecture focuses on light-dependent reactions and how they work. It shows how light energy can excite electrons which can be used to create ATP and NADPH. [9:04]