Here is a fun thing to do to a teacher you don't like, or a teacher you like to piss off. (Assuming there is a teacher that you do like which is highly doubtful).
Get your computer. If you have a microphone hooked up, disable it. If you have an advanced sound recorder like I do (Audacity) then use that but if not use the default sound recorder that windows offers under entertainment. Find anything that you think your teacher wouldn't like related to sound. Example: Music, Words, Soundboards, anything. Record it to your computer using the sound recorder. Then record a blank track with nothing but silence. Make sure you record the EXACT time of that blank track. I did mine in 1 minute and 25 seconds. Take the two tracks and put them on a blank CD with the silence as the first track. Usually every teacher has some sort of CD player or something in their room to play music on. In my teacher's classroom, she had a CD player over on a bookshelf. Take your CD to school and find a chance to put the CD in the CD player. I had a friend ask the teacher if they could talk to her outside which worked. When your chance comes, get up and put your CD in the CD player. Make sure you have a way to count the seconds like a watch or something. Turn the sound ALL THE WAY UP and press play. Right when you press play start your watch or whatever your're using to count the seconds. Hurry and go sit down at your desk. At the right time when you know it, (cause you'll have yoru timer) pretend your asleep or something and it will go to the next track and BAM!!! It's fun and funny and whatever i thought it was. Later.

I send my teachers e-mails from fake addresses with fucked up subjects while they're projecting from their laptops. Works well.

I sent my teachers horse porn.

Some requested more.

haha thats funny

Dude if your serouis then you can have some serouis blackmail potentiol.

I've been out out of highschool for a while now.

Do some stoner a favor then. Give em a tip on how to pass Mr. Teachers class.