When the computers are lent to the students to type their diaries, they all know how to type correctly. This isn't consistent with their backgrounds.
When "Mrs G." tells the students that they won't be with her in their junior year (the first time) she is writing on the board. The writing originally is "write a first person na".......and then it goes from "...narrative" to "...na" and then just "...first person".
When Ms. G is talking about writing Miep Gies instead of writing a report about the diary of Anne Frank, the information on the chalkboard changes 2 or 3 times.
At the beginning of the movie when Mrs. G is new to the school, in the office, she picks up her coffee cup and puts it down, then in the next shot you can see her putting the coffee cup down again.
The scene where Miep Gies tells the day Anne Frank was captured was told with some factual errors. Gies never went back to her house that very day to get bribery materials.
Erin Gruwell in real life is right-handed, unlike how she is depicted in this movie. This is because actress Hilary Swank who played this role is left-handed.
Not only do the same newspaper headlines recur throughout the movie, the article is the same: nutrition and the obesity rate.
The same newspaper headlines recur throughout the movie, even though the movie takes place over several years.
In several indoor scenes, the light from the outside did not correlate with the action. In several classroom scenes, the lights were on and it appeared dark outside. Conversely, when Erin was sitting at her kitchen table in the evening discussing with her husband, it appeared daytime outside.
The diaries of multiple writers were consolidated in the book that Ms. G submitted for publication. Because there were multiple writers, shouldn't the title include an apostrophe after the S in writers, to indicate plural possessive? Change it to "The Freedom Writers' Diary". For that matter, there were multiple diaries so make it "The Freedom Writers' Diaries"
Near the end of the movie, the class meets at a park with a lighthouse. This is Shoreline Aquatic Park in downtown Long Beach. In 1994-1995, this park had not been constructed yet.
Ms. Gruwell makes a reference to "Snoop Dogg" in the movie, but during the timeline of this story, he was still known as Snoop Doggy Dogg.
The movie is set in the early to mid 90's. At this time Starbucks Coffee had not yet introduced the "Way I See It" cup, and would not do so for at least 7 years, yet Mrs. G is seen holding one when entering the classroom and while drinking her coffee in a few shots
In one scene set near the beach, a Toyota Sienna is seen in a parking lot in the background. The movie is set from 1994-1996, and the Toyota Sienna did not debut until the 1998 model year.
When Gruwell's husband, Scott, is watching football on TV while lying on his bed, the Falcons are playing. However, the Falcons didn't have those uniforms or Michael Vick, the star player of the Falcons, in the early '90s.
Miep Gies pronounces Anne's name as it would be said in English, rather than the way she would naturally pronounce it in Dutch.
In the scene where the students are reading The Diary of Anne Frank, one of the girls is reading a sentence, and then flips 3-5 pages instead of one.