Mildred discovers that there is something which she is not worst at - drawing. Ethel, however, who can't bear the thought of anybody being better than her at anything, is determined to thwart Mildred. Part of Ethel's scheme involves her "client' Drusilla winning a prestigous art contest judged by the new art teacher at Cackle's.

Miss Cackle's young niece, Gabrielle Gribble, comes to the Academy for teaching practice. Suffering from a bit of stage fright, Gabrielle takes Miss. Hardbroom's advice of being tough a little to0 seriously & she becomes a tyrant who throws the entire class in detention within minutes of her first day. Soon Mildred & her friends end up teaching her far more than she ever learned in College.

The girls are very excited because it's the thousandth birthday of the Castle! Miss Bat is preparing a performance of the Spell girls with Fenella, Griselda, Sybil and Clarice. While Mildred is elbowed out of her drama slot by Ethel! Meanwhile the girls are shocked to find that Ethel's father & the Chair of the School, is planning to sell the Castle!

Ethel & Drusilla's prank casting a boat adrift with Mildred's cat aboard takes a dangerous turn when the cat & an unconscious, Miss Hardbroom head towards the rapids! Meanwhile, Merlin has accidentally frees a Dragon Lord from his captivity who threatens to imprison the town forever unless he gets his lost treasure back! Now its up to Mildred to save the day!

Love is in the air, or at least Miss Crotchet thinks it is. The visiting Professor Von Raffenberg seems to be smitten with her, but it turns out he is a conman, who is looking for the Lost Chord, which will grant the owner perfect luck! Some of the girls can see right through him, while others are conned into helping him.

Mildred & the other girls notice Miss Drill is down in the dumps. They decide to give her a potion which will allow the non-magical Miss Drill to temporarily gain magical powers! Now the other teachers are trying to help Miss Drill hone her powers, while the suspicious Ethel & Drusilla try to prove that Mildred & her friends are behind it all!

Miss Hecketty Broomhead returns to Cackle's Academy to take over while Miss Cackle goes to look after her sick aunt. She takes an instant dislike to Mildred & even forces her to wear a tracking bracelet at all times! Meanwhile her insistence on rigid time-keeping proves to be quite the problem, especially when she is considered to be a permanent replacement for Miss Cackle!

It's time for the dreaded Third Year Witch Project where nerves are frayed & unlikely partnerships forged! The girl's projects range from the typical of a retrieval spell, to the unique of a mini broom to the downright odd of chewing gum that never loses its flavor! The final demonstration in the Great Hall nearly ends in disaster, but all the girls work together to make the day memorable.

Mildred, Maud, Ethel & Drusilla are sent on work experience to Mrs Cosie's Cafe & learn all there is about running a restaurant. That is until Ethel changes the Cafe to be the way she likes it. Ethel claims its just for fun, but when a group of tourists & Grand Wizard Hellibore all arrive at the same time the girls must find a way to get out of the mess!

Mildred and her friends try to join Ethel's Cauldron Club, but Mildred fails the initiation test after interference from Ethel. Luckily for Mildred, Fenella & Griselda, come to the rescue and create the Dangerous Old Books Society! Soon the stuffy old club begins to lose its luster & it's members! Meanwhile Miss Drill contemplates quitting after growing tired of Miss Hardbroom's harassment.

Mildred's potion exam, & gardening competition are both happening at the same time! Her chances of passing look slim, as Ethel and Drusilla conspire to get her thrown out of Cackle's. When Mr. Blossom's greenhouse is trashed, Miss Hardbroom suspects Mildred, & forbids her from participating further.

The girls are restless, & they can't wait for the term to end. Miss Drill introduces the girls to basketball and arranges a friendly match with the Hevversham Hevvies! The Hevvies are ruthless & walk all over the girls. Mildred is hopeless and has a tendency to freeze when it's time to shoot at the basket! The entire school is watching, which doesn't make it any easier for her!

Mildred & her friends plan on sneaking out of boundaries & go to a nearby sweets shop! Meanwhile a greedy businessman & his kind hearted, but weak willed assistant plan on converting the surrounding woods, the shop & even Cackle's into a pollution spewing factory! Now with a little help from an also rule breaking Miss Cackle, the girls form a plan to save the day!

A summer heatwave has hit Cackle's & the girls are succumbing to the heat. Miss Cackle produces a magical soda, that is so refreshing it's all the girls can think about. Soon wanting more, Miss Cackle decides to have a contest to see who can make the best non magical soda. However Ethel decides performing a little bit of magic is worth beating Mildred.

After Mildred causes an accident in potions, the school requests funding for newer equipment. The School's administrator, who happens to be Ethel's father, thinks this is the perfect time to bring Cackle's into the modern age! After residual effects from Mildred's mistake mixes with the new technology causes an even bigger problem! Now they see modern technology is not all it's cracked up to be.

Miss Cackle's birthday is a day of legendary boredom! Enid, determined not to sit through the boredom, drags a reluctant Mildred into a store cupboard. Ethel notices & locks the door on them! Inside the locked cupboard Mildred is in despair - this is the last straw, she's bound to be expelled! With the help of a badly damaged broom, they may be able to escape!

A trip organized by Miss Drill is to be a strictly "no magic" camping trip. Things get even worse when the group encounters a Scout troop of mortal boys (Including Jay Baruchel) also camping in the woods. The two groups merge to compete together in team building activities. Soon though the "no magic" rule goes out the window, as Ethel is determined to win.

Chief Wizard, Egbert Hellibore & his three apprentice Wizards pay a visit to Cackle's Academy. The girls soon see how mischievous & underhanded the boys are & a prank war begins, with Mildred being blamed for it! Soon there will be a debate between the boys and the girls & Mildred finds the boys are using magical trickery to cheat! Now she plans on turning the tables on them!

The girls are told the legend of Sir Walter who died in a rainstorm centuries ago outside the castle. Whenever there is a storm Sir Walter is said to walk the corridors, looking for revenge! Now Mildred & the girls are out to see if the legend is true! Meanwhile the girls decide the quality of the food they're being served is poor & demand a change!

It is nearly the end of Mildred's first year at Cackle's Academy & everyone is happy, except for Miss Cackle! She's short with all the students, particularly Mildred whom she threatens to expel. The girls soon learn that, it is in reality Agatha, Miss Cackle's evil twin, returned to take over the school! Now they must prove it to the other teachers & save the day!

Ethel thinks it's Mildred's fault that Sybil is always following her around, so when things go too far during a lesson of broomstick flying, Ethel vows to get her back, by turning her into a frog! With the help of a wizard who has also been turned into a frog, Mildred just might turn back & figure out who did this to her!

Mildred & Jadu's expulsions are on the horizon & the other girls try to find a way to save them. The girls plan on running Maude for Head girl hoping to use their influence to save the two. When that plan falls through they decide steal Ms. Cackle's spell book & they end up creating a danger far greater than they've ever faced! Now it's up to Mildred to save the day!

The young witch in training, Mildred Hubble, has a less than desirable start of her first year at Miss Cackle's Academy as she makes quick enemies with the prissy Ethel Hallow & the tyrannical Miss Hardbroom for arriving late on her first day! To make matters worse, Mildred quickly finds herself in deep trouble & is on the verge of being expelled!

Stopping to rest in the valley below Mildred comes upon a group of witches & hears them planning to take over Cackle's Academy! Mildred, thinking on her feet, turns all the evil witches into snails. Back at school, while Miss Hardbroom does not believe Mildred, Miss Cackle recognizes the description of the Chief Conspirator as her wicked & jealous twin sister, AGATHA.