My wife, English teacher, had to cover for a science class the other day.
The permanent teacher was out for a medical appt. one day, and another day of recovery.
She had left instructions for whoever substituted her classes.
She did not, however, leave a big note on the bowl of eggs in the back. In the book cabinet. Not refrigerated.
A note like 'These eggs are for an experiment we're running on Friday' might have at least slowed the sub down.
But she apparently saw nothing wrong with eating a couple of eggs from the back of the classroom. Then went home with food poisoning the next day.
I'm afraid to even SMELL stuff at random in a chemistry class, much less eat it.
Had a really great chemistry teacher in 9th grade. He was fearless and completely responsive to any student's curiosity.
I was so sad when we blew up the lab...
Our chemistry teacher used to say things like "This experiment was banned from schools in 1956, so we had better do it in the fume cupboard". He was infamous for making a smoke bomb and unleashing it on a bunch of kids who were running noisily in the corridor outside his lab.
But his finest moment came when the inspector from the local education authority discovered that he still had a stash of metallic sodium in the chemical store, in contravention of the latest safety regulations for school laboratories. He was directed to dispose of this material as soon as possible; So he gathered his entire A level class at the school swimming pool, where he preceded to demonstrate the behaviour of a kilo of metallic sodium in a chlorinated pool.
It shot around the pool, on fire, making a hissing roar, generating clouds of steam illuminated from within by the flames, and occasionally bouncing off the sides of the pool. It remains one of the most impressive things I have seen.
The PE teacher never did work out how the pool chemicals got so massively out of balance. Or how so many of the tiles at the waterline got cracked.