Relentless in her attempts to incorporate Lithuanian Studies into the curriculum, Polly insists that the school hold a traditional Gazotski folk dance and after much consideration chooses Sanjay to be her partner. Although Sanjay is initially apprehensive, he quickly becomes infatuated with Polly however she is disgusted by his poor dancing skills. Meanwhile the strain of being a teacher is growing too much for Miss Belanchof until Miss Graves helps her become more organised, until one of Miss Graves' lesson plans wins Miss Belanchof a plaque and a cheque for $5,000.

The Squirrel Girls hold their annual cookie-selling contest for two girls to win places at Squirrel Camp, but Nancy's ruthless tactics to go on camp with Penny end up forcing Penny out of the contest, meaning that Polly wins the other place. Meanwhile Jessie is forced to have all of his shots when Polly decides to check out everyone's medical cards.

The girls get excited when a new ping-pong table is introduced to the playground, but deciding who gets to play first causes problems as each method of choosing meets with conflict from everyone else. Meanwhile Vinny and Jessie pick up some swear words at the arcade and start using them around school

Jessie's mom finds out that the other boys are bullying him and tries to help him out, but only ends up embarrasing him further. Meanwhile Nancy finds out that Jordan is really rich, but the other girls soon get tired of her bragging.

Polly becomes popular when she gets a pony, but as the kids all take turns to meet Snowball they find out that it's not as great as they thought as Polly forces them to answer questions on ponies before she will let them near it. Meanwhile Jessie pretends to have sent his book report to his Nanna and Pop-Pop's by mistake to stop Miss Graves from grading it.

The kids are very thrilled to see a new car during their baseball game, until they realize the new car is Mr. Besser's car. He doesn't want the kids to mess with his car. But when Jessie boasts he did it, he is sent to Mr. Karl's class. At first, he thinks it's a nightmare, but because the kids in Mr. Karl's class are dumb, Jessie takes advantage of this punishments and never wants to leave the class. While Jessie is having fun in Mr. Karl's class, the rest of the class is overkilled with fire tests. Arthur knows this and invites kids during the fire tests.

Nancy has a lot of bad luck and learns that Mercury is in Retrograde. This means she might miss a baseball game, but at 2.15 PM everything will be the same again. And poor Freddie had to go to the toilet, but spoils a bit water on his pants, but the kids believe he was peeing in his pants.

Jesse and Vinnie enter a science fair when they learn that the winners get to go to Space Camp, but they are caught cheating. Nancy and Penny do a project about bugs for the science fair. Polly chooses Freddie and they make a project about spoons, which Freddie sabotages.

Polly takes over reading the announcements over the school's public address system and soon starts to broadcast everyone's misdeeds. Meanwhile, Jesse stays at home for few weeks due to his ankle injury. At first, he wants to have fun, but Miss Graves decides to make him participate in the class with the help of the camera.

Picture Day arrives and Freddie is really proud of his cowboy shirt until he finds out that Polly is wearing one just like it, but his attempts to hide the fact quickly fail and the class makes fun of him all day. However when it finally comes to taking the picture, Miss Graves positions Freddie behind the board giving the name of the class to avoid him being embarrased by the photo. Meanwhile Jessie fakes an allergic reaction to get out of doing the Science test but is forced to do it anyway and fails miserably.

During practice for the Chorus recital, the music teacher starts to give birth and practice ends before Arthur can rehearse his solo, and when Mr Besser becomes the new music teacher, things go from bad to worse. However Arthur calls in a few favours and Mr Besser is replaced by the hopeless Mr Jackson who is keen to work on Arthur's solo, until Polly suggests that she and Arthur perform it as a duet. As Arthur grows more and more annoyed with Polly's interfering he decides to change the words, upstaging Polly when the two perform the piece. Meanwhile Jessie cuts the pictures out of the encyclopaedia to get a good grade on his Mammals report, but when his plan to put the pictures back goes wrong, Miss Graves finds out and forces him to clean every book in the library.

As Sports Day approaches, Nancy is sure that she will win all the events she enters, but as the flu season hits she becomes increasingly concerned about falling ill and missing the even. However as she tries to protect herself from the germs she ends up losing every event that she had entered and eventually gives up her principles to take part in the potato sack race with Penny who is ill. Meanwhile Jessie injures his nose while rollerblading and uses the injury to get out of doing schoolwork, however when he makes a miraculous recovery to paticipate in Sports Day, Miss Graves makes him water boy as punishment.

Nancy arrives at school and immediately begins bragging about her new boyfriend Jeremy, and while the other girls are impressed to begin with, they quickly become bored of Nancy's stories and Tilly begins to doubt that Nancy even has a boyfriend. When Nancy and Jeremy meet up after school she tries to make him change his image and the next day he fails to turn up for their date. When the girls ask to meet Jeremy, Nancy tries to put them off meeting him, worried that he won't turn up, and they become even more certain that Nancy is making the whole thing up. However when the girls eventually do get invited to meet Jeremy, he turns up just as they are leaving, much to the shock of all of them. Meanwhile Jessie starts borrowing Freddie's homework to copy it but is caught out when Miss Graves sets Freddie a special assignment instead of the regular homework.

Arthur pretends to leave his lunch at home when he learns that the cafeteria workers give great free meals to kids who forget their lunches. Meanwhile, in order to get revenge on Zack after he bullied her, Nancy tries to learn karate.

Polly becomes a junior librarian and is determined to reclaim all of the library's overdue books, driving everyone crazy in the process. Arthur collects the books from his friends and opens his own library.

Vinnie and Jessie find a list of teachers' phone numbers and decide to prank their teachers, however after Jessie calls Miss Graves, Vinnie is caught pranking Mr Besser and is forced to be his helper for a week. The next day, Miss Graves asks Jessie what his phone number is and he begins to worry that she is going to phone his mom about the phone pranks. In an attempt to intercept the call, Jessie fakes illness in order to stay home and guard the phone, but when he returns to school the next day he learns that Miss Graves only wanted to call his mom to tell her that he had won the perfect attendance award, but seeing as how he missed school she didn't need to call her. Meanwhile Nancy becomes friends with Polly in order to join Penny on a trip to the International Lithuanian Dance Festival, but when Penny has to stay home sick she refuses to come, not wanting to get in the way of the close friendship that Polly thinks has grown between the two girls.

Jesse gets the math book with the answers to the tests by mistake and it helps him become "smart". Because of this, he wins a prize at the math competition, but finds out that he has to answer the math questions in front of the whole school. Meanwhile, Nancy pretends that she has difficulty listening so she can sit up front with Penny, but instead she is sent to see the school nurse.

Nancy persuades all of the other girls not to try out for a babysitting job so that she is sure to get it, but soon she and little Lara Johnston find out that they hate each other and Nancy gets the sack, but she is too embarrased to tell the others. Meanwhile Arthur sets up a ""personal"" babysitting service but hires the other kids to do the sitting for him.

In order to eat the same foods as Penny, Nancy goes to the health store and ends up being scared into trying a totally healthy diet, and soon all of the girls are eating only healthy foods, resisting temptation to eat their favourite foods. Meanwhile Freddie's birthday approaches and in order to get more tickets during the trip to Monster Land, Vinnie and Jessie persuade all of the other kids not to go, however on their first ride on the Bllod Drainer the ride breaks and they are stuck hanging upside down for three hours. When Freddie comes to school the next day, he brings his cake with him to share with the class and while Vinnie and Jessie are too ill to eat any, Nancy gives up her diet to have a piece.

Nancy is thrilled to be going to her grandparent's in Miami for summer vacation, but when she arrives she soon finds that things aren't as great as they seem. The other guests are boring, the restauraunt is horrible and no matter what Nancy tries she seems destined to be banned from using the pool. However when Polly arrives at the site she and Nancy manage to work together and have a great time, but as the two arrive back at school Nancy is still determined to stay away from Polly as much as possible.

Jessie is worried about failing the eye-test, but his attempts to cheat end up with him having to wear glasses, making it hard for him to see anything. Meanwhile, Nancy and Charlie are competing to be voted best athlete in the class and Nancy thinks she has worked it so that they will tie, but when Jessie is unable to see the ballot paper he accidentally votes for Charlie, winning him the vote.

The kids all get excited about the chance to see the ""Your Body is Changing"" film, until they learn that they have to go with a parent. Jessie thinks he's got away going without a parent until his mom turns up and manages to totally embarrass him, making him miss most of the movie and not finding out where babies come from. Meanwhile Polly opens up her Spoon Hospital for another year, but tragedy strikes when she accidentally breaks lunchlady Martha's serving spoon.

Nancy and Vinny start going out after they find they like each other while cleaning the classroom, but as Nancy thinks everything is going perfectly she discovers that Vinny is cheating on her with another girl. Meanwhile Arthur learns that his aunt is throwing him a surprise pool party but he doesn't know how to swim and signs up for lessons, only to find out that Polly is the teacher.

As Haloween approaches, all the kids are excited about what costumes they are going to be wearing. Vinny and Jessie both agree not to go as Space Beasts, but both then break their promise, however while Vinny comes in a proper Space Beast costume, Jessie's home-made version makes him look more like a mermaid. Mr Besser is determined to go as a pirate, but when Vinny and Jessie teach his parrot bad words they both get found out at the party. Meanwhile Nancy finds out that Penny is going as Little Bo Peep and decides to buy the same costume, but when she arrives at the party she can't find Penny, only a person dressed up as a sheep. Assuming that it must be Penny, the two enter the costume contest together, only to find out too late that it is actually Polly inside the costume.

All the kids are excited as the school fair approaches and every one of them is determined to get their hands on the two bikes up for grabs. As the stalls get under way, it seems that every kid has their own way to try and mnake the most money, however while the others are concerned with running stalls, Arthur is offering to promote each stall if the other kids pay him and then takes all the custom by offering kids the chance to win a stereo if they can knock down the cans at his stall. As havoc prevails at each stall, the kids are all eager to learn who has won the bikes when they find that the hopeless Mr Jackson has collected up all of the money without counting it first.

After tricking Mr Besser with a dollar tied to a piece of string, Vinnie and Jessie are both sentenced to be his helpers. As well as the horror of doing the principal's duty, Jessie also has a spelling test to look forward to until his mom tells him that he is going to have to stay at his Nana and Pop Pop's because she and his father are going away for a few days. Excited at the prospect of missing the test, things aren't as great as they seem when the house is snowed in and the power blacks out. Jessie tries to make the most of it, but as things start to get better his mom arrives to collect him, bringing with him the spelling test so that he can do it on the way home.

The other kids are all amazed when Jordan's baseball skills suddenly start improving and she explains that it is due to Feng Shui and positive chi. Intrigued by the spiritual lifestyle, Nancy becomes obsessed with Feng Shui and soon Miss Graves is forced to humour her new lifestyle and splits the class in two to see whether Feng Shui really has any benefits. With Nancy and Vinnie heading the two sides, the rest of the kids keep switching their minds as to whether Feng Shui works or not, however Nancy's side seems to be having the more luck. However when the others find that Nancy has a pocket mirror in her bag, they accuse her of trying to steal their chi and turn on her, causing the class to revert back to normal.

All of the girls get excited when they see the new Cleopatra hair-style by Simon of London and in an attempt to become more popular, Nancy tells the others that she is going to get her hair cut by Simon. After begging her mom and promising that she won't ask for anything ever again, Nancy finally manages to get to the hair salon, but the resulting style from Nigel the cleaner makes her look more like a poodle. Meanwhile Polly can't stand it when Freddie gets a better grade than her on a paper on butterflies and insists that Miss Graves remarks them, sparking a debate that eventually leads them to Mr Besser's office.

Shocked by Jessie's consistently poor maths scores, Miss Graves recommends him for the remedial program, but rather than attending the lessons Jessie spends the time bowling and going to the cinema. However when he finds out that his improvement is going to be tested, he bribes Sanjay to take the test for him, but the miraculous increase in his scores ends up with Jessie being moved from remedial maths to advanced maths. Meanwhile Polly sets up a stall selling spoons in school but finds that interest amoungst the other kids is low.

In order to not have to perform Mr Flop-Flop the Christmas Bunny at the school play, the kids band together to force Mr Besser to hand over control to them, however the ensuing arguing ends up with Nancy taking control of the play, much to the annoyance of the others. When the day of the performance arrives, Nancy and the others all end up stealing each others lines and although the play is a hit with the parents it turns out to be rather unconventional.

Miss Graves is called to the doctors when it is believed that she has medical problems until it is revealed that it was just a mix-up, however rather than returning to school she decides to take the rest of the day off. Back at school, Mr Besser is forced to take over as the substitute teacher for the class and soon appoints Polly to take over his duties in order to get rid of her infuriating ways. When Vinnie writes an essay in which he calls Mr Besser a cold hearted liver butcher, he thinks that he is going to end up in permanent detention until he realises that he has misspelt Besser, saving himself from punishment.

As election fever hits the school, everybody seems to be running for class president except for Polly who is off ill. When Nancy is made to go round and see how Polly is, she lets slip about the elections and Polly forces herself well again in order to stand for president, forcing the rest of the competition out of the race and winning by default. However when the kids grow tired of Polly's forceful ways, they lead a revolt to force her out of power.