My use of the term "looser" was not at all continuing with my history here of *toying with the spelling of 'loser'.

Looser structures, as you indicated here...

"I think the better teachers have a good plan, but know how to improvise."

...are the ones that inspire students and instill the ability to adjust, adapt and learn in different settings. They ask more questions because they are challenged in more ways than regurgitating "The year tobacco was introduced in Virginia". They are being exposed to useful concepts at an earlier age.

'Competition' and 'stress from testing' aren't two of those useful concepts...