It is a very good and clear presentation covering the chapter from HL of Biology - photosynthesis and respiration. However maybe not all the material is present in this presentation. Only this 2 processes are explained with diagrams, colorful images and animations. For some the language used could be found too scientific but with the aids of animations everything will be clearly understood.
To view the presentation:
open the file > click F5 > enable the content > right click > play > and start learning.