Screech falls out of a chair and knocks a bowl of chips on the floor. When he gets up, he has broken chips in his hair. The size and position of the broken chips in his hair changes between shots.
At the last minute, Rod Belding talks the class into changing their class trip to white-water rafting down the Colorado River. However, the National Parks Service has restrictions on privately-organized trips, including having a wait-list that is only open in February and has thousands of rafters on it. Rod could not have even gotten the class onto the wait-list, let alone made it to the top of the list on such short notice.
Rod Belding tells the students to hold their tests over their heads; once they do that, he tells them to tear them up. Screech starts to rip his up before the order is actually given.