This is awesome! I love seeing the way classes were handled back then. I was first certified around 1980 (YMCA) and it wasn’t that different. I remember having to recite Boyle’s Law, Henry’s Law, Dalton’s Law, Archimedes Principle, and tons of additional physics and physiology that you don’t touch today until you become an instructor–if ever.
We also spent countless hours working out complex multi-stage, repetitive, decompression profiles using Navy tables! You don’t get anywhere near that stuff today unless you’re specifically involved in deep, technical diving. I love it!