As a teacher, I have always taken a side-on approach to teaching technique. Rather than simply repeating established ideas of mastery, I aim to guide my students in a more accurate personal direction. In my opinion, it is important for a student to play the piano "with their own two hands", rather than blindly following prescribed movements.
To help develop technique, I provide my students with appropriate repertoire and explain the reasoning behind particular fingering choices. While I offer corrections and guidance, I try to avoid overly prescriptive teaching methods and instead encourage students to develop their own understanding and realization of improvements.
I also believe it is important to address technique within a musical context, such as through specific pieces, exercises, or technical patterns. When students ask questions about technique, I try to ensure that they are connected to a specific musical problem rather than being abstract.
As a teacher, I have been fortunate to have had mostly good mentors. However, I do wish that I had received more instruction in sight reading, as this was an area where I struggled and had to teach myself. It is important for teachers to recognize that even if a student is able to learn pieces quickly and express themselves well, there may be other areas that require attention and improvement