Johnny at School...

--- Johnny by the Dean ---

DEAN : Why are you late?
JOHNNY : Because of the sign.
DEAN : What sign?
JOHNNY : The one that says, "School Ahead, Go Slow."

--- Johnny at Maths class ---

TEACHER : Johnny, why are you doing your math multiplication on the floor?
JOHNNY : You told me to do it without using tables!

--- Johnny at English class ---

TEACHER : Johnny, how do you spell "crocodile?"
JOHNNY : K-R-O-K-O-D-A-I-L"
TEACHER : No, that's wrong
JOHNNY : Maybe it's wrong, but you asked me how I spell it!

--- Johnny at Chemistry class ---

TEACHER : What is the chemical formula for water?
JOHNNY : H I J K L M N O!!
TEACHER : What are you talking about?
JOHNNY : Just yesterday, you said it's H to O!