Did you know Illich invented the term "iatrogenesis", sickness induced by medical activity. Is there educational iatrogenesis. Yes. Anyone who teaches knows this is true. That is why it is so important to hand over the reins of learning to your students as soon as possible. As Blake noted in "Proverbs of Heaven and Hell", the tygers of wrath are wiser than the horses of instruction. This is why we 'unschooled' all of our children. Exactly why.