School jokes

I want to share with you with another jokes. This time it will be school jokes.
I hope you'll like it ;)

The teacher to a pupil:
- I can't understand how it is possible for one person to make so many mistakes in a short essay.
- It wasn't one person, sir. My father helped me.

The teacher asks:
- What does HNO3 mean?
- Just a minute, sir. I know, I have got it on the tip of my  tongue...
- You'd better spit it out, it's poison!

The teacher checks homework.
- Open your exercise books... Jane, when do you do your homework?
- After dinner, sir.
- So why this homework is not done?
- Because I'm on a diet.

Nadia G 2A