She tells the girls to partner up

Miss Forte has the girls get into groups of two. The leftover girl is partnered with the teacher. Miss Forte strips and lies on her back, spreading her legs wide, and orders one girl in each pair to do the same. She has the other girl clasp her hands together behind her back and kneel between their partner's spread legs. Miss Forte explains, "You have two minutes to make your partner cum using only your tongue. Those successful get a reward while those failing get punished. Ready, begin."

The gym immediately filled with all kinds of sounds: slurping, sucking, licking, moaning, gasping, yelling, squealing and screaming. This went on for two minutes as the girls writhed around on the gym floor until Miss Forte yelled, "Stop! Those of you who came are to lick your partner's pussy until the end of class, make them cum as much as possible. As for the rest of you if you didn't cum, have your partner kneel with their asses up and heads down. You are to punish them for not making you cum today, beat their asses as hard as you can until the end of class, maybe they'll try harder next time. We have about twenty minutes until we hit the showers, get to it."

About half the groups fell into each category and soon there were some girls screaming in ecstasy as some screamed in pain and sobbed.