In what ways does robin williams contradict what you consider to be effective teaching?

What do you consider to be effective teaching? Possibly this article might help:

http://www.members.cox.net/dagershaw/lol/LearnMotivate.html

Do any of those relate to Robin Williams? Although humor helps in learning, it is only humor that illustrates what is being taught rather than detracting from it.

I hope this helps. Thanks for asking.