Mostly a survey, I think, aimed at improving human teachers by providing guidance on what they can do, etc. Some interesting points:
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Sometimes there are no examples to order/present to the student. So a teacher must generate them.
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For when a human has to help a classifier learn something, the concepts the human transmits vary a lot but the idea of an "informative sample" is constant among different concepts. Thus, teaching guidance only needs to be specified once.