Continuity mistake: When Matt comes downstairs in 'street clothes' and his Mum begins to complain, Lizzie puts her backpack on her bag, which is hanging open unzipped. However during the scene, between shots, the bag suddenly does itself up without assistance.
Continuity mistake: After Gordo's science project model brain explodes, it sprays "brain goo" everywhere. The continuity of the amount of goo on everyone, and the position of the goops of it on them, continues to changes through the scenes. Eg., Lizzie's face gets completely covered yet when she goes out into the school hallway, her face is almost clean.
Continuity mistake: When Matt askes his dad to pass the basket of garlic bread over, as Matt puts the basket down on the table, the end slice of bread falls out of the basket. But in the next shot the whole loaf is inside again. Also the position of the basket changes.
Continuity mistake: After the aptitude test, when Gordo, Lizzie and Miranda exit the classroom and walk down the hallway talking, as they progress, the binder and book that Miranda's holding keep on switching positions between shots, and they also change from showing their front/back alternatively.
Continuity mistake: When Lizzie, Gordo and Miranda sit in class as receive their aptitude tests, we see Miranda's hand under the desk, holding a pencil. Then she informs the others that she feels gum under the desk, only her hand is now empty. She then has a pencil in it once again in the next shot.
Continuity mistake: When Lizzie is drawing her science poster about the brain, she is using a large felt marker which runs out after she has written "Br..." She the proceeds to try and write an "a" but the pen is dry, however some marks do come out of the pen. However in the next shot the marks are gone, and the area where she tried to write the "a" looks untouched.
Continuity mistake: When Lizzie is sitting at the table drawing her science project poster about the brain, in the first wide shot, you can see that there is a yellow felt tip lying on the poster. Then in a close up of Lizzie writing, the pen has moved completely. In the wide shots it is back to its original place.