After a negative teacher review, Janine gets a confidence boost when a student gets transferred from Melissa's class into hers. Jacob tries to forge a friendship with an uninterested Gregory.

With the school board threatening to pull their funds, Janine and Gregory decide to help Ava out with her presentation in front of the Superintendent. However, their plan is derailed when a curveball is thrown at Ava. Meanwhile, Barbara offends Melissa when she doesn’t agree with her blackmail idea.

After Gregory sends a disruptive student to the principal’s office, he’s dismayed to find out the kids actually enjoy spending the supposed disciplinary time with Ava. Meanwhile, Melissa invites Janine over to her house to teach her how to cook, but Janine becomes determined to reunite Melissa with her estranged sister

Barbara organizes a candy-selling fundraiser to raise money for a school field trip to the science museum. When sales don’t go as planned, Ava steps in to teach the students new, unconventional selling tactics. Elsewhere, Mr. Johnson and Jacob butt heads about how to take care of a cat found in the janitor’s closet.

Abbott Elementary takes a field trip to the Franklin Institute; Gregory is eager to spend time with a reluctant Janine; Ava teaches the students about aliens, which leads to chaos.

When Barbara's church choir uses the gym for rehearsals, Ava notices tension in the group. Jacob's eagerness for a full social calendar worries Gregory. Melissa and Janine investigate a new substitute.

It’s Halloween at Abbott Elementary! Janine and Gregory proudly show off their couple’s costume, but it fails to translate. Meanwhile, Barbara faces pushback from parents concerned about hygiene and her beloved apple-bobbing tradition.

When the teachers hit a karaoke bar for a night of fun, Jacob bumps into an old friend.