It may be good to answer the original question, "Any teachers here?"
I'm on the fence, and in-between. I do have a teaching degree for school, with learning disabilities & 2nd language learning in there. (I'm not the only language teacher here). I've taught in the classroom and also one-on-one; looked into alternative systems such as Waldorf, visiting classes, The one-on-one later on often was troubleshooting. The first time I ever had music lessons, it was as an adult on a new instrument, and a bunch of things went wrong. At the end of that, I got a piano, which I had played self-taught as a child. Because of the first experience, I went deeply into teaching-learning for music - so as to not fall into a hole as a student a 2nd time. Some of this was public dialog and a lot was private, including with a number of teachers and over a longish time. In my studies with my main teacher, pedagogy, teaching ideas, have been an element for quite a few years now.
I am still a student, and still learning. I've explored problems and solutions with fellow students, including passing on things that I've learned in all of this. Some of this may be considered "teaching". And also for me - learning. As far as that is concerned, I see fellow-students in the fora sharing experience and guiding all the time - maybe there's a gray and blurry line. A couple of teachers have urged me to start teaching for real, like officially. So, dunno.
The things that interest me especially has to do with the process of learning, approaches. This does mesh with my teacher training, plus what I learned from actual music teachers. In "school teaching" we learned to create teaching units, set out aims, objectives, means of getting there, assessing. That's geared to teaching a group, and a tad cumbersome for individuals doing music - but some of it applies. In learning to play the piano we are aiming to learn to play a given piece: we are also learning to acquire skills; both things intersecting. There's a whole gamut of stuff attached to all that. How does a teacher bring these things across, in what order - what activities does a student do at home so as to acquire these things, organizing their time how, etc.? This interests me greatly because of that first experience. There's a thread here about a scientific approach (dunno the exact title atm), and it has some of those elements.
I cannot call myself a piano teacher or music teacher, though.