Some cool jokes

 Teacher: "Give me a sentence starting with the letter 'I'".

Pupil: "I is-"

Teacher: "No, you must always say 'I am'."

Pupil: "Okay, 'I am the ninth letter of the alphabet'."

TEACHER: What is the chemical formula for water?

SARAH : "HIJKLMNO"!!

TEACHER: What are you talking about?

SARAH : Yesterday you said it's H to O!

TEACHER: George, go to the map and find North America.

GEORGE : Here it is!

TEACHER: Correct. Now, class, who discovered America?

CLASS : George!