Throwing chalk at Dr. Roy (Hindi)while he would write on the black-board
Doing masti while Hardiyal Singh (English) would go to sleep in class
Doing total timepass, drawing, packing bag in the last period of the day of Mr. Saxena (Maths)
All the back benchers eating peanuts, chips, etc while Shaikh Dabir's class
Try to find out which student Mr Purohit (Music) was hitting on while teaching music