Very nice StAIR on photosynthesis. I like how potentially unfamiliar terms are given further explanation. Students are given immediate feedback for questions asked during the presentation. Students who are struggling readers may need additional guidance as the presentation leans heavily on the ability to read and understand the concepts.
Overall a great presentation.
A back button could be potentially useful. I accidentally hit the forward button at one point and I had no way to go back to see what I had missed without returning to the beginning of the presentation and beginning again.