How can i keep my hair curly though out the day?

I'm planning on curling my hair with a curling iron tomorrow for school.

Is there any way to keep it curly through out the day?How can i keep my hair curly though out the day?
well if its with a curling iron idk but u could try mouse or hair sprayHow can i keep my hair curly though out the day?
Use Mousse! works GREAT