I dont think it is fait to compare divnig class work to college or especially high school class work. Diving is all voluntary. I signed up, because I wanted to learn to dive. I was forced to do high school work, and most of that crap was useless, in my opinion. But when I sign up for a class, I do it because I want to learn how to use whatever skills that class has to offer. I also have the knowledge reviews done within 2 days of picking up my materials, including when I signed up for my Dive Master class. I think people also put too much into the classes, even OW. All that OW c-card does is says you have been exposed to the basics, and performed some skills to a standard good enough to be signed off on. It is up to the student diver to go out, dive and continue to build on those skills. My first 10 dives after my OW cert was going to the quarry with a OW class, and just trying to hover behind the platform the class was working on. One of those dives was 53 minutes, in 50 degree water at 22 feet, just hovering. I could have went diving at other quarries, and done 100 foot dives, but I didnt feel like I was ready for that. I did just 25 to 30 foot dives, until I was ready to take on other challenges. My LDS tells me I am by far the exception to the rule, but like someone else said earlier, its my life I am dealing with. I only get one shot at this, I dont want to learn anything the hard way.