Grading the students' papers, Miss Halsey marks Tristan's essay test as "Stupid point Misspelled" circling the word "layer" (which is lawyer without a W). However, she misses the more obviously misspelled word "lawer" (lawyer without a Y), and overlooks the use of "whose" instead of "who's".
When Halsey draws a circle around the celebrity's breasts in the magazine, she marks it with a star. In the next shot of the magazine, the star has disappeared, and now all three photos of breasts have been circled.
When Elizabeth's roommate rips the mirror off Halabi's Taurus, he throws it and it slides under the Volvo wagon across the lot. Later the mirror is seen in the middle of the lane, no where near where it was thrown earlier.
When Ms. Squirrel eats the apple covered in poison ivy, she rubs it on her face which results in a rash where she rubbed it. However she would have also had this rash on her lips and mouth, but she does not.
(at around 47 mins) Elizabeth orders her class to open their copies of "To Kill a Mockingbird" to page 1, and asks them why Jem cries when the hole in the tree is filled with cement. That scene doesn't occur until chapter 7.
Elizabeth is seen collecting cans from the school in order to pay for breast implants. Illinois does not have existing container deposit laws, however, Elizabeth could have earned money through selling the cans for their aluminum value to a recycling center.
At the beginning of the film, Elizabeth Halsey speeds backwards violently past a school bus and makes a sharp turn leaving visible tire marks on the ground. You can see tire marks on the ground before she creates them and were probably created in previous takes.