What is the problem with my teacher????? ( not funny)?

UA

New member
There is one teacher in my school. He is so polite and good teacher. but every Saturday he became angry and so rude. every saturday. there wasn't any problem in class this saturday. but he became angry. and punished the whole class. Can anyone tell me what is wrong??
Heyy, I am studying in urdu medium, and it closed on sunday only. and one more he teach our a subject of English
 
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