Before the food fight, Meredith's hair is straight. During the fight, it is wavy. Afterward, it is straight again.
When Yasmin is wearing a face mask and talking to Bubbie (before they start dancing) her hairstyle keeps changing. In some shots, two strands are coming from her forehead, and one is above each ear. In other shots, the forehead strands are gone. They change several times during the conversation.
After the announcement of Meredith's birthday party, the girls rush straight to a mall. They enter wearing different outfits than they wore school. When they enter a shop, they are in their school clothes.
When Jade backs up to the trash can during the food fight, no spaghetti is on the ground. In the next shot, she slips on a large pile of spaghetti.
The dancers behind Meredith change positions between shots.
When Jade adds up the numbers, Jade adds up 2,147 to 2,268. Jade says 5,415 when in actual fact it is 4,415.
Jade in the science class scenes wears her hair down when performing science experiments. She would not be allowed to do so as all high school labs require students to wear their hair up and keep it out of the way in case of an accident.
Dylan is deaf, so he couldn't have known what to dance to at Meredith's Sweet 16 when she previewed Yasmin dancing "La Cucaracha". However, Dylan can lip read. From the dance Yasmin was doing in the video, it's not hard to guess what song it was.
During the cheerleader tryouts, Sasha is obviously a stunt double.
The Bratz all wake up in the morning with their makeup already done and their hair styled before their day has actually started.
After Cloe accidentally spills her spaghetti over the lunch room staircase and it falls on Jade, she trips on the dropped noodles and falls into a garbage can, which rolls away. Not only is spaghetti not slippery enough for someone to trip on it the way she did, but due to some awkward editing, it looks like the garbage can is rolling away before she actually falls into it.
When Cloe kicks the soccer ball to Cameron, the ball becomes a plush soccer ball when it hits Cameron.
When the Bratz girls dive to the ground, trying to save Principal Dimly's bronze statue, the crash mat they land on is clearly visible for a split second, followed by the view of the girls clearly crawling onto their stomachs.
Dylan infers through his dialogue in the band class scenes that he only recently lost his hearing and wasn't deaf his whole life. While this may explain why his speech isn't yet slurred, as he still retains the muscle memory needed to speak, it brings up the question on how he is so good at lip reading. Even lifelong deaf people can only read lips well enough to understand 30% of the conversation, as some people speak too fast, mumble, or have facial hair that masks their lip movements. For Dylan to be so good at lip reading after only recently losing his hearing is almost impossible, or at least highly unlikely.
When Yasmin's brother films her dancing and singing, his finger is covering the camera on the phone.
When Jade produces fireworks in chemistry lab, one of her friends calls it a great example of the "Bernoulli effect". Bernoulli's principle represents a relation between the velocity and pressure of fluid flow. It has nothing to do with fireworks.
Yasmin calls out Dylan for bumping into her when they first meet. However, in the actual scene, it can be seen that it was actually Yasmin who bumped into him, not the other way around.