A class you must take during the summer if you have not taken your required gym class during the high school year. Usualy a four hour period for 2-3 weeks.
Stacy: Hey Jen, you wanna stay up and party?!
Jen: I want to, but I have to get to bed.
Stacy: But it's only 9:00pm!
Jen: I know, but I have to wake up at 8:00am for summer gym. We are going bowling!