Thanks for detailing the examples so well.
It certainly makes sense that your method of having students practice pool skills in mid-water would produce better skills compared to PADI's method of being on the bottom most of the time to practice skills, at least immediately after certification.
To help weigh this improved quality versus the possible additional costs, would you be willing to provide some estimate of your typical pool size and depth, pool time, class size, and number of people assisting underwater?
I know what our local PADI situation is like, so that will help me compare.
Any significant departures in such "overhead" costs from a typical PADI pool class?
We used a number of different pools so the size varied. Most were 10 or 12 ft deep at the deep end.
Average class size was six or so.
I always had at least one DM and sometimes as many as three or four.
We spent about 15 hours in the pool. Usually 5, 3 hour sessions.
Drop out rate about the same?
No drop out to speak of. You lose a few to scheduling conflicts. I can remember a couple I didn't certify due to nonpayment. I remember one lady who was in the pool with us for about a year. She was better in the water than most instructors I've seen. Her skills really were perfect but, for whatever reason, was just scared to death in OW. She tried it here several times and in the tropics and she just would look down and refuse to descend. I don't remember any who failed because they couldn't meet the skill requirements. All in all, the change in teaching method made things easier on everyone, including me. Students could enjoy the diving during OW dives rather than being overwhelmed and I didn't have to have my heart in my stomach because the students could dive. They lacked experience but they knew how to dive.
What's the typical scenario in the pool? Are most of your students off the bottom at the same time? Are they allowed to let their fin tips touch the bottom when practicing the skills? Does that still count as "mid-water". Are they allowed to bob to the surface? Is perfection required?
There are some skills that are needed to avoid drowning before you can get busy with much diving. Of course, at that early stage students could use the bottom but I kept them horizontal rather than vertical. We're used to being vertical and it's a habit that needs to be broken for diving. Some students have a harder time kneeling than hovering horizontally anyway. The first time we're clearing regs or masks, touching the bottom is no big deal.
Boddy position and finning techniques are practiced on land first. In the water we adjust weighting for trim and re-adjust as body position improves. We spent lots of time practicing diving (controling position and movement in the water colum). I wish I could tell you that there is something tricky here but there really isn't.
Is prefection required? I woudln't say perfect but functional. For example, I would expect a student doing a mask R&R to be able to hold their depth within a couple of feet. Being too far off just means we're going to practice some more. I would expect students to be able to do that excersize in buddy teams...meaning that if the maskless diver needs depth ques or a tactile reference it would be the buddy providing that rather than me. I would also expect the maskless diver to notice if his/her buddy was swimming away. Maintaining control and awareness is the primary task, replacing the mask is secondary. When this happens to them on a real dive, I won't be there so they need to be able to handle it without me or I can't certify them.
Right after certification, I assume you've seen improved skills in your students compared the typical PADI program, but do you any objective info on how long it takes the latter catch up in skill level?
Some of the things we taught in OW, aren't taught in any PADI class. PPB introduces some of the concepts but it stops short, is weak on actual performance requirements and isn't a required course. Some divers won't ever be taught much about trim, body position or doing anything midwater unless they luck into a good mentor or go onto technical training. Unless they find the tools someplace, they can't ever catch up.
I saw improvements before certification. Avoiding OW training dives that were total clusters was a major driving force in this. I'm surprised I didn't have a heart attack before I fugured out that all I had to do was teach how to dive in the pool first. LOL Doc, it hurts when I do this...well don't do it anymore.
Anecdotally, I can tell you that it was common to have con-ed students with a range of certification levels who couldn't pass the simple skill assessment that I used. It consisted of (in buddy teams) a descent with a stop at a predetermined depth. Stop and hover above the bottom. Demonstrate non-silting propulsion. Midwater mask R&R. Midwater airsharing. An ascent with a stop at some predetermined depth prior to continueing to the surface. I won't take a diver who can't complete this into OW conditions. I just won't do it. I have done it and there were too many times it didn't work out so good so I won't do it again.
Data would be nice to see. I've thought about conducting a study by administering something very close to my skill assessment to a large number of divers with a range dive experience and training levels and scoring them using abjective measures but I'm short on time and resources these days. It would be interesting and make for good discussion here on the board but you'd think that someone in the industry would be doing it. They aren't and I don't think they ever will. I don't think anyone really wants to discuss the level of dive skill in diving.
I wonder how the two groups compare if they rarely dive.
I don't know other than to say that you can't lose what you never had. I want them to have it before I take them to open water and certainly before I certify them.