I agree, Bluewater.
When I was in the middle of my course, I came across a wonderful documentary on GUE's Rec 1 course. The name of the documentary is "Testing New Waters: GUE Rec1 Dive Course"; it was directed by Elena Konstantinou (
"Testing New Waters" GUE Rec1 dive course on Vimeo). (It was filmed in your area of the world!)
The only substantial difference between my course and the course described in the documentary is that I didn't use a dry suit and the students in the documentary used dry suits. However, learning buoyancy control, horizontal trim, and the unified team concept were fundamental in my course in the Saint Lawrence River and the course described in the documentary in the Red Sea. On the basis of those skills, other essential skills such as being able to share gas in a second (as donor or receiver) without losing control of team, trim, or buoyancy, are learned by repetitive practice. It's amazing how the right repetitive practice solidifies muscle memories. I remember the first times I tried to share gas; I was so discombobulated that I would end up high up or far below from my buddy; it is important to learn to do it immediately and with control so that one does not become overwhelmed in an emergency situation and become overcome by panic.