Continuity mistake: The position of Lisa, the blood, and the windshield cracks change between the suicide scene and the scene of Rachel discovering her dead body.
Continuity mistake: When Tracy and Jesse hook up in his car, Tracy puts her tank top on. When Jesse drops her off at home she puts her book bag over her shoulder. When she turns around to go into her house you can see that her book bag strap is under her tank top strap.
Visible crew/equipment: At the beginning when young Rachel runs back into her house after her mom gets taken away, as soon as the front door slams shut you can see towards the bottom that a thin pole has pushed the door.
Plot hole: After the scene of Rachel as a child, there are six days worth of events in what should be five days. Monday Lisa kills herself. Rachel works at photo hut. Tuesday Jesse and Tracy have sex, Walter is hit by car. Wednesday Rachel stands Jesse up because Mark and Eric have come to her house. Thursday Jesse and Rachel's first date - no sex. Thursday again Eric meets with the DA and Jesse and Rachel have sex. Friday is the game and party.
Continuity mistake: After the season opener football game, Rachel is seen in the back seat of a convertible with two other girls in the front, heading to a local party. In that scene the sun is shining. In the the next scene, as the girls arrive at the party, it is dark outside.