What is an Island?

TEACHER : What is an island ?
Pupil : A piece of land surrounded by water except on one side.
TEACHER : On one side ?
Pupil : Yes, on top ! 

More 1- Liners

Teacher: Class, we will have only half days school this morning.
Class: Hooray
Teacher: We will have the other half this afternoon

Student: The brain is a wonderful thing
Teacher: Why do you say that?
Student: Because it starts working the second you get up in the morning and never stops until you get asked a question in class!

Teacher: Be sure that you go straight home
Student: I can't, I live just round the corner!

TEACHER : Give me three reasons why the world is round
Pupil : Well my dad says so, my mum says so and you say so ! 

TEACHER : What shape is the world in?
Pupil : Rotten ! 

TEACHER : Why does you geography exam have a big zero over it.
Pupil : It's not a zero, the teacher ran out of stars, so she gave me a moon instead ! 

TEACHER : What's your name ?
Pupil : Ravi
TEACHER : You should say "Sir"
Pupil : OK, Sir Ravi ! 

TEACHER : I want you to tell me the longest sentence you can think of
Pupil : Life imprisonment ! 

TEACHER : Name four members of the cat family
Pupil : Daddy cat, mummy cat and two kittens ! 

TEACHER : What is further away, Australia or the Moon ?
Pupil : Australia, you can see the Moon at night ! 

TEACHER : Ravi, can you find me Australia on the map please ?
Pupil : There it is
TEACHER : Now, Ravi, who discovered Australia ?
Pupil : I did ! 

Pupil : I wished we lived in the olden days
TEACHER : Why is that ? 

TEACHER : What kind of birds do you find in captivity?
Pupil : Jailbirds ! 

TEACHER : What is the plural of mouse ?
Pupil : Mice
TEACHER : Good, now what's the plural of baby ?
Pupil : Twins ! 

TEACHER : What's the longest word in the English language ?
Pupil : Smiles - because there is a mile between the first and last letters ! 

TEACHER : I despair, Ravi, how do you manage to get so many things wrong in a day ?
Pupil : Because I always get here early sir !

TEACHER : What do we do with crude oil ?
Pupil : Teach it some manners !