The most important component of effective teaching is very difficult to
implement. It has to do with building new knowledge on what is already
known and understood. In a typical class each students has a different
background; often dramatically different from is assumed. A teacher is
expected to do "the best s/he can" under the imposed unfavorable conditions.
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Ludwik Kowalski, a retired physicist
5 Horizon Road, apt. 2702, Fort Lee, NJ, 07024, USA
Also an amateur journalist at http://csam.montclair.edu/~kowalski/cf/