As I am currently pursuing my pre final year in engineering field. I always feel frustrated when my teacher still teaches even after the bell rang. Yesterday it was the core subject class, when my teacher teaches still after 10 minutes of bell rang, I really felt frustrated and in anger I have thrown my pen , at down to the bench and made a sound. But no one noticed except my friend, then she wrote the notes for me. Is there any wrong in my thinking? .How can I get rid from this?. Also however we please the teacher they never ever understand about us. Their only target is to complete the syllabus. It’s really making me depressed and stress.