Do you and I have the right to piss off management and our bosses? What makes them so special?
You don't seem to understand what tenure is. Tenure doesn't protect teachers from being fired if they act irresponsibly or do not do their job. Tenure only protects the teacher from being fired without just cause.
The case here is really the question of whether allowing a student to build a marshmallow gun powered by compressed air represents just cause. The administration says it is, but they have an axe to grind with the teacher in question because he's also a union representative, etc. (as detailed in other comments)
The suggest that the solution is to just give the administrators the right to fire all teachers without any justification for the firing is idiotic.
My exwife and I worked at school districts. Trust me if administrators want a 1 and 1 they get a stiff rebuke email from the union rep threatening job termination without the union there! What the hell?
Do I get this at my job? No. I am employed at will. So you are stumpy. It is in good taste and for fear of liability that we have an HR representative due the threatening and a humiliating letter 3 times in a row and then a box and boot out the door after time# 3.
Yes some may want to mod me down after reading the last paragraph or think I am being a dick, but I am just the messenger here. Remember at work it is always about the customer. Not you. Kids and parents are the customers.
This is what it is like everywhere and if principals had more authority our schools would be better. Yes I will concede teachers put up with a lot of crap and have big responsibilities. I understand that.
But understand the lack of firing people make them do batshit stuff like claiming "... not dressing appropriately " in their teaching certificate or making up stuff in science fairs. It is standard procedures in the teaching world when someone is tenured or the union rep says "NO! You may not put down such and such in this write up ... etc" so this is a way around it.
I have seen this at 2 different school districts.