1. Be interested in your subject.
  2. Know your subject.
  3. Know about the ways of teaching.
  4. Try to read the faces of your students, try to see their expectations and difficulties, put yourself in their places.
  5. Give them not only information, but "know-how," attitudes of the mind, the habit of methodical work.
  6. Let them learn guessing.
  7. Let them learn proving.
  8. Look out for such features of the problem at hand as may be useful in solving the problems to come ...
  9. Do not give away your whole secret ...
  10. Suggest it, do not force it down their throats.