In those situations, that is the best class sizes for electricity tomfoolery, sprinkled heavily with bravely, and a side of youth assumed immortality.

It is also a good class size to swiftly move bodies, of things get too bad.

I had a similar sized class when I apprenticed as an electrical worker via "future farmers if America" funding.

I learned so many good ways to fix things correctly, and three times that number in "bad" ways to fix things.

Guerrilla learning method with pratical daily needed subjects is SORELY missed now-a-days.