What is the difference between the videos offered in both?

What is the difference between the videos offered in both?

Good question, LL562 :thumbup:

The On Demand course is a comprehensive prep program in and of itself (containing pre-recorded lesson videos, each 3 hours long and corresponding to a different segment of the Lesson Book, within the full online syllabus and in addition to the set of 5 Review Notes texts), whereas the Science Review is an online component to help students improve their science content mastery using at-your-own-pace workshops (not videos) and sample passages in each of the four topics: physics, gen chem, o chem, and biology. The Science Review does not contain videos.

Look here for my explanation of the Science Review:
http://forums.studentdoctor.net/showthread.php?t=802541

Hope this helps!

Thanks Lauren, been wondering this for a while