JKSManga
I am also a teacher and what the school is doing is ilegal. I dont know what country you are working in, or indeed what country you are from but I would suggest getting your Union involved, seeking legal representation, and applying for another job. Whilst things are shady just play the waiting game with them, compile evidence and then when the time is right you can leave without notice due to extenuating circumstances...
dear author I hope things get better and turn out well I must admit I enjoy reading your books every day it's very hard for me to find authors I like and you have alot of dedication to your readers even so far as to tell is what is going on and I can only hope to continue to enjoy some of the best books I have ever read