Well I've seen it in various ways (not just scuba, but there too):
- A - The instructor that yells and screams and is doing so basically to make up for an obvious lack of skill at the "instruction - people - end of things". Maybe a very competent diver, but essentially a bad instructor who is mostly stressed out. Not good, but still can be learned from with the right attitude. But why? Why pay that person and learn something while not enjoying it at all?
- B - The instructor that yells and screams seemingly all the same, but less to make up for a lack of teaching skill, more as method to drive students to better and better performance. It works for some, maybe many students, not for all. Some of those will love the class, some not. Some students, maybe those who can't take " the good thing is you didn't cry - yet" as a compliment, will hate it.
One obvious problem is that the "type A" instructor invariably always believed to be a type "B" instructor and won't ever see the misconception...
- C - An instructor who achieves his / her teaching agenda quietly methodically and w/o all the drama. Some of those are doing very well eaking out top prrformance out of their students. Even if, some students that prefer the hogh energy approach may think ot is a class that is too relaxed. Others will love it...
Then on the student side:
- A - Will learn no matter what and will self improve no matter what. Isually does not make excuses and carries on with learning and will thrive whether "cared for or not". It is a mindset, not a capability. The naturals progress faster, the klumsy ones slower, but the mindset will make them progress.
- B - progressing well if nurtured and caref for. not so well if not, but still actively working on improving their skill every dive.
- C - Not sure how to put this: The difficult student. The student who thinks he tries hard and spends tome and effort trying hard, but is not actually trying, w/o seeing that he is actually not even really trying. The student that actively seeks advice for his improvement, but then criticises that advise, making excuses for why it cannot be followed.
A simple hypothetical example: Say I have 140 dives. Say I have a bunch of C-cards. Say I think I am quite OK with my diving and plan to take the next level class - whatever it is... and you dive with me as a buddy.. no current ... and you see me descending basically hand over hand on a descent line only, ditto for ascends. And you see me never hanging free in the water column during a safety stop to practise buoyancy control or helicopter turns or back finning or whatever, but you always see me literally hanging, clinging on the line instead. Ignore all else, if you observed this would you not think I could do a bit better in improving my diving just by utilizing those practise opportunities towards practising... e.g. being neutrally buoyant or descending w/o using the line for propulsion by controlling my speed, or ascending that way, or...
Then assume I ask you for your advise as to what I could improve...
And you give it ...
Well if I take it well and take it to heart and a light bulb goes off and I change my ways to not squander away those free practice opportunities you dd a good thing...
But if I tell you why your advise does not really apply and why I need to dive the way I do and why it's plenty good and adequate for now, you probably wonder why you said something in the first place and may choose to not do that again and just see me repeat the same thing over and over again with little or very slow progress. I could be that hard to talk to dive buddy and I may be a hard to teach student too in that case.
Now, would that "B-type" instructor from above do me any good and manage to knock me off my path with the "pedagogically applied drama" and knock me onto a better path? Maybe. Maybe just the opposite.
Would the "C-type"? Maybe, if he/she is really good and makes me see my flawed ways. But I may, due to my nature (in that hypothetical example) still resist that instructor who is trying to change my ways and like that instructor quite less than one who goes along with my ways and just waits it out intil I get it no matter how long it takes...
That must be a tough balance to strike as an instructor, more so if I (in that hypothetical example) come to your tech class, "higly recommended" by my vast array of rec. C-cards and you come to realize I really just don't belong in this class yet and may have to tell me...
Anyway, I've seen divers like that and I admire an instructor (also seen that) who can get through to them and have them actually achieve the course objective well... and much more so, if the student is "turned" in the process to become an actively learning diver.
And I've seen the instructional train wreck that can happen if the instructor is oblivious to essentially working up to that with the student at hand...