Factual error: The vehicles in the movie have front and back license plates. The state of Florida does not have front plates, only back.

Continuity: During the presentation the heart on Marie's friends necklace keeps moving positions during different shots. Sometimes it's hanging from the left side of the heart, sometimes the right. It is extremely unlikely that the heart would move that vigorously while she is calmly sitting in a chair.

Continuity: During the presentation the people in the seats in front of Elena keep changing seats at different head-on shots. There's even an additional girl that wasn't there during the first shot.

Continuity: In the very beginning of the movie Marie almost hits Elena with her car in front of the school. After Elena apologizes for getting in the way, it shows her walking up the stairs, and when it zooms out to get the full shot, she has yet to start walking up the stairs, and walks up the stairs.