Goof (revealing mistake): When Chyna, Olive or Fletcher are checking their ANT pads when they receive or are sending messages, you can easily see that it's just a black screen and there's nothing on it.
Goof (factual errors): Chyna's mother stated security hassled her about her battle Axe, in real life bringing any kind of weapon to school is grounds for expulsion.
Goof (factual errors): The young blonde girl says she has eidetic memory, and can remember everything she hears, sees, and reads. However, eidetic memory is the ability to hear OR see OR read, and remember only one. Your other senses are less reactive. Meaning, if you can remember anything you've ever read, you forget more things you've heard.
Goof (continuity error): Chyna, Olive, and Fletcher sneak into Lexi's party. When Chyna's dad shows up, Fletcher's hairstyle is totally different.
Goof (continuity error): When Angus initially puts his foot on the desk his sock has a full gray bottom. The next time we see his sock (from a different camera angle) it now has a gray and white bottom with "Hanes" written in blue letters on the bottom.
Goof (errors made by characters, possibly deliberate errors by the filmmakers): On a dry erase board in the A.N.T. Farm homeroom is written the quote, "Music and rhythm find their way into the secret places of the soul" Plato. The word 'their' is spelled incorrectly. It's spelled 'thier'.
Goof (audio/visual unsynchronized): When Olive hit the golf ball with the club near the end, there was no sound of the ball hitting the wall.
Goof (continuity error): When the pile of bricks comes crashing through the window, the bricks' position changes between shots.
Goof (continuity error): When the wind blows the feathers off Chyna, her hood is up. In the next shot, her hood is down.
Goof (errors made by characters, possibly deliberate errors by the filmmakers): Madame Goo Goo says her name has always been Madame Goo Goo, but in "Cantonese Style Cuisine" she says her birth name is Chrysanthemum Turtleneck.