Very nice collection - added to list
along with some saved taped videos of great physics demos - where the elements of the formulas are moved around, as the voice describes the point of some operation. As only computer graphics can do (easily.)
'Tis the sort of stuff I wish would have been around when I Needed it.. All those stages -- like before you quite grokked why 'cross-multiplying' ..?.. works and then, it Clicks.
Gracias