I liked maths and physics, the biology teacher was very strict and the sudents used ot be petrified of him, so we did not mess around in biology.
No thincking about it we were terrible to the Chemistry teacher. Got sent out of the class for blowing up a beaker. During the expt each group was given a very small amount of sodium to watch how violently it reacts with water. So instead of follwoing instructions we collected the sodium samples from the class and made a ball of sodium about 15mm in daimeter. As soon as the ball of sodium was dropped into the beaker it reacted so violently it exploded, blew up the beaker, water everywhere and a ball of sodium hit the class room ceiling and slowly burt itself out, leaving a black stain in the ceiling still there many years later.
DO NOT REPEAT this experiment because its very dangerous, take advice from your chmistry teacher and follow instructions.