The prom is a formal dance for students in grades 11 and 12，and is generally anticipated as the most important social event of the school year.It can also be a time of anxiety，as boys have to work up the courage to ask a date to the prom，and girls hope the right boy invites them.These couples dress in formal clothes—girls in long gowns，boys in suits.Some students even arrange a limousine and driver for their group of friends to arrive in style！At the prom，students dance，have snacks and drinks，and chat.Prom usually ends with a Prom King and Queen being announced and crowned on stage before an envious audience.