Prior to being allowed to enter the profession prospective teachers should be asked to talk with a group of friendly students for at least half an hour and be able to engage them in an interesting conversation about any subject the prospective teacher wants to talk about.
Tragedy is a hell of a teacher. It's much too strict but it's a hell of a teacher.
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My art teacher in junior high was a very out gay man and a mentor to me. He would tell us about Greenwich Village and show us the 'Village Voice' and describe his life but it was all sort of subversive and below the radar.