I'm with you Iyere -- kids have to eat dirty sht to help them garner immunity so why not making mistakes to help them learn correct and wise procedure -- Is there another way? Obviously for the modern-day teacher not -- given they were probably bullied to the point of...becoming a schoolteachers ...whatever! I guess it also depends on a given personality -- some might have to tear up the town, as it were, just saying -- lol -- not me of course! ...No, no! Some can't do that, so they are destined to teach! As Jack Black said in school of rock - "those who can't do, teach!"

¯\_( ͡° ͜ʖ ͡°)_/¯something like that!