When Mikey goes to the animal cage in the classroom, he is wearing a black shirt. When he turns around to see the teacher, his shirt is red. When he comes to talk to the teacher, the shirt is black again.
Mikey shoots an arrow at Shawn and misses hitting the picture of the two pinned to the door. The arrow changes places between shots. In the initial shot, it's through her chest, but in the following shot it's above her head.
In the opening credits Ashley Laurence's name is spelled Ashley Lawrence with a 'W'. Her name is really spelled Ashley Laurence with a 'U'.