How do I set a "school" location in apple maps?

I used to have this section in the scroll down "Today" menu, it would say something like "it would take you __min to drive to School right now from your current locations" and when clicked it would show me directions. I'm switching schools, so how could I change the location of the School shown in the scroll down menu? Thank you! I have an iPhone 4S fully updated by the way.