I'm with DevonDiver on this one. I think people really need to get over the duration part. Even before eLearning in the less than ideal Pacific Northwest, I've done 3 day classes. I would never certify someone if I didn't think they had proven mastery. I ran a college program where we did two nights per week, an hour and a half per night for 8 weeks of just classroom. Then 2 hours a week in the pool for the same 8 week period. I had worse divers come out of 40 hours spread over 8 weeks than I did in 3 days and vice versa. It is dependent purely on the student, the prep work and the instructor, NOT on hours.