K-12 best I can recall I had about 43 different teachers. I can only think of 4 that really seemed to care about their students.
I know my mom was always disappointed in my teachers, felt they were just calling it in.
College was different. Many great teachers there. But I went to a private University where Professors were required to teach their classes, grade all their students assignments, keep office hours and if they wanted to publish, that was fine, but it took a back seat to their students.