As the teachers return from summer break, Ms. Watson tries an ultra premium online dating service and Ms. Snap learns that she's been given the worst group of kids in school; Mrs. Adler is assigned to a mobile classroom.

There's a trespasser at Fillmore and a new security guard is hired; Ms. Snap and Ms. Bennigan hold a ''Women Empowering Women'' workshop; Mrs. Adler takes stranger danger too far; Ms. Watson purchases a male safety dummy.

Mrs. Adler and her husband move into a tiny house; when Ms. Cannon's homemade jewelry shop fails, Ms. Watson and Ms. Snap try to boost her morale; Ms. Feldman fakes a lesson and Ms. Bennigan struggles with a student.

Ms. Bennigan learns Hot Dad's son has to repeat second grade; Ms. Snap brings her dog to school as a therapy dog; when Ms. Feldman has to teach her students Common Core, she discovers it's more complicated than she thought.

Ms. Snap decides to run for School Council and is thrown into a world of double standards; Ms. Bennigan, Mrs. Adler, Ms. Feldman, and Ms. Cannon help with the campaign, but Ms. Watson takes longer to get on board.

Ms. Feldman can't make ends meet on her salary and takes a second job; Ms. Watson notices a romantic spark between two of her second grade students; the teachers take advantage of Principal Pearson.

Ms. Snap struggles with the idea of turning 31 and tries to regain her youth; Ms. Bennigan offers to baby-sit Blake for Hot Dad; the teachers deal with every teacher's nightmare when the copier breaks down.

When a tornado touches down near Fillmore, procedures go out the window as the teachers panic; Principal Pearson puts the teachers on probation until they complete a team-building course.

Mrs. Adler has to coach Fillmore's kickball team and is surprised to see a group of overly-confident dweebs show up; Principal Pearson reviews security footage and discovers the teachers' skeletons in the janitor's closet.

Ms. Snap changes the school lunch menu while Ms. Feldman starts an underground junk food ring; Hot Dad volunteers for lunch duty and Ms. Bennigan works up the nerve to ask him out on a real date.

Ms. Snap looks to impress a local radio personality at the school's country-themed dance, and Ms. Bennigan obsesses over whether or not "Hot Dad" is seeing his ex-wife again.

A trip to the gynecologist sends Ms. Watson and her ticking biological clock into a tailspin, while Ms. Cannon and Ms. Snap prepare for the dreaded standardized testing.

Ms. Feldman struggles between her budding romance with Fillmore's new anti-drug officer and her love of marijuana. Ms. Watson becomes addicted to bingo; Mrs. Adler wreaks havoc when she tries to quit smoking.

When the Wi-Fi goes out at Fillmore, Ms. Snap is forced to go into the forgotten and seemingly haunted library in order to get a book. Ms. Watson has a confusing dream about Principal Pearson.

Ms. Bennigan decides to ask Hot Dad out during a chicken pox epidemic at the school. Ms. Snap discovers she has a gender bias.

Ms. Cannon discovers that one of her students is an artistic prodigy. Mrs. Adler and Ms. Watson take the mini-society competition to a new level.

When Ms. Bennigan and Hot Dad become official, Ms. Snap thinks that Ms. Bennigan has abandoned her and begins sitting in on their dates. Meanwhile, Mrs. Adler and Ms. Feldman try to track down a troublemaker.

Ms. Watson and Principal Pearson struggle with balancing their new romantic relationship at work. Ms. Feldman takes April Fools' Day too far.

Frank and Principal Pearson start reviewing security camera footage to try and figure out who is stealing cleaning products from a supply closet, in the process learning many of the teachers' secrets.

After Mrs. Adler announces she's pregnant, we're taken back in time to the 1940s, where the women of Fillmore fight for better treatment at work.