I once had a history teacher who would get so engrossed in a subject he would stray from the curriculum to canvass a more interesting topic.
He was animated in the classroom, encouraged debate, organised regular field trips to build on what had been discussed and used humour to lighten the mood.
From memory, everyone in the class passed the end-of-year exam.
Another teacher, a few classrooms away, would write his lesson on the blackboard at the start of each lesson. He would wheel around abruptly, point to what he had written so as to indicate it should be copied and then sit behind his desk in absolute silence for the lesson.
He found school just as torturous as his students.