Surprise party I have a doubt, can I say " when I came home my friends had had a surprise party for me"? or should I say "made a party" or "throw a party" ? And what about the preposition "for" or "to" me?

Grad school Please, what means "Grad school" ? When someone says that has got accepted to grad school, it means that he has finished College, high school or... Can anyone help me?