Under the subject "Theorems concerning quadrilateral properties" there are 45 minutes of proof videos and 1 practice module.

It's not enough, because the videos discuss so many proofs on parallelograms (quads, rectangles, diagonals, opposites, and rhombus') the single practice unit that groups them all together is so confusing. 

Add a few more practice modules, each for the type of proof we are trying to learn to actually cement the learning and not eventually get it with rote learning.