Hear all the screaming and yelling at Abbott Elementary School? It doesn’t come from the children. This is “the gang” from “It’s Always Sunny in Philadelphia” who will be visiting “Abbott Elementary” as volunteers in the highly anticipated crossover.

In the upcoming season 4 episode 9 of “Abbott Elementary,” Ava announces that the school district is sending a group of volunteers to help out at Abbott, but when they arrive, “things don’t go as planned,” ABC says of the Consequence.

Janelle James, who plays lead Ava on the show, told USA TODAY, “It was cool and surreal” to have the cast of “It’s Sunny” on her set and “to be on her set at Paddy’s Pub.”