Not often. I usually do less than a half dozen OW classes a year now. I'm 60 and don't feel the need to teach the entire world to dive.
I don't. I adapt my class to my student. I've taught people who were afraid of the water. Got one all the way through and the other made it through the pool and stalled in the ocean. In fact, I get a large proportion of problem students sent to me by frustrated instructors from as far away as the PNW and Holland. The only "trick" I use is to introduce trim and buoyancy right at the start.We do a bit of mask clearing in the kiddie pool, but once we put the Scuba unit on, we work from the top down: not the bottom up. Within a half hour they are frog kicking close to the bottom, but not on the bottom. Lots of laps, all designed to get them comfortable. Once they move psat the white knuckle stage, we move on to the traditional skills.
I'm not a confrontational instructor. I don't fight, demean or belittle. I don't try to take peeps down a notch. My worst student was an instructor who thought I was full of crap and wanted to rub my nose in it. He fought me for most of the class and I was frustrated because I could see this as an ego trip for him. He would not fix his trim and tried to show me that he didn't need to. So, I tried something new. We dropped down to the bottom and I would swim to the wall and then back away from the wall using only my fins. He's next to me trying this, but his bad trim made him keep rising and flailing. He would descend and try again, but his poor feet down attitude kept working against him. Oh yeah, he wouldn't meet with me an hour or two before the class to get my vector lecture, so he had all that working against him. When he finally got serious about trim, he started to have fun. I was then able to take him through some of my other exercises. One is called side to side. The student pretends they are looking under a ledge, so they start within a foot of the bottom. They pivot to their left side, kicking only with their right fin. Your left (bottom) fin would be too close to the bottom to kick without stirring things up. Two kicks and they spin to be on their right side, kicking with only their left fin. This increases control and confidence. Some get it only two laps, some need four. At this point, he had stopped fighting me and got it in two. FWIW, I teach my trim, buoyancy and propulsion class to instructors for free. Usually, it's centered around them learning how to teach OW off the knees. He wants to come back with a fresh mind to see how I do it. I will probably ask him to come when I'm teaching and just observe. I love pool work. That wasn't fun for me at all.