Lily
A student to his teacher: “I haven’t got no pencil.”
Teacher, correcting him: “You don’t have any pencil. He doesn’t have any pencils. We don’t have any pencils.”
Student, with a look of astonishment: “Where have all the pencils gone?”
Seven rabbits
Teacher: If I give you two rabbits and two rabbits and another two rabbits, how many rabbits have you got?
Paddy: Seven.
Teacher: No, listen carefully again! If I give you two rabbits and two rabbits and another two rabbits, how many rabbits have you got?
Paddy: Seven.
Teacher: Let’s try this another way! If I give you two apples and two apples and another two apples, how many apples have you got?
Paddy: Six.
Teacher: Good. Now if I give you two rabbits and two rabbits and another two rabbits, how many rabbits have you got?
Paddy: Seven.
Teacher: How on earth do you work out that three lots of two rabbits is seven?
Paddy: I’ve already got one rabbit at home.