pauldw
Contributor
I saw this referenced in the recent Alert Diver: https://dan.diverelearning.com/ and gave it a try. They're little online classes, with quizzes and so forth, but no patch or gold star sticker or anything at the end. That's OK; I didn't even get certified for my Science of Diving class with SSI. It's just learning for the sake of learning. Some of them may be a little boring (I'm looking at you, pointless summary of available first aid classes), and one is too into medical minutiae (the pathophysiology one), but especially in the others there were useful things I didn't know about at all (not surprising, I know).