Try these simple ideas when u get bored in the classes: these are Tested and Proven methods!
1- sit in the backside seats, make a group of buddies in the whole class and humm a song- take care your lips dont move. when 15 people humm song together, it makes a good resonance in the class- and noone can know who is doing that!
2-practise making paper rockets- and try shooting them across the hall with the tip of your two fingers in an absolutely unnoticeable movement! it is possible.
3-ever tried blasting a Time Bomb in the class? it's easy- tie a regular Diwali Bomb to the distal end of an Agarbatti- and light the agarbatti and leave it on some backside benches of the class. it will blast in the middle of the 45 minute class. Then all in the class can just run out of the class in a havoc and stempede the teacher in the process!! Terrorism is the answer to tyranny!
4-simple- ask some jerk who never wants to miss a class to call "yes" when teacher calls your number!!