I watch and listen to movies today and am shocked by the way actors deliver their lines. Everybody mumbles now and I don't understand why.
People talk about mumblecore but I prefer bumblecore hyper-realistic bee movies about how bees really are.
When in doubt mumble when in trouble delegate when in charge ponder.
Just as the science and art of agriculture depend upon chemistry and botany so the art of education depends upon physiology and psychology.