Teaching is a profession, not a job. Real teachers facilitate learning. The best teachers are those who inspire curiosity in their students.

The age group is also a factor. I can teach elementary kids and middle school kids in small groups, but I'm only effective with HS kids one-on-one or in a mixed age group. I'm most effective teaching adults, because in almost all cases they want to be there, and that's at least half of the motivation to learn.

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“Never attempt to teach a pig to sing; it wastes your time and annoys the pig.” ― Robert A. Heinlein