During the filming of the scene when Torrance, Missy, Jan and Les carpool to a football game, a driver, angry that the film's motorcade was making him late for dinner, attempted to drive the camera truck off the road. It appears the character of Les is just an overly cautious driver who keeps checking his side mirrors. Huntley Ritter is really watching Mr. Road Rage get pulled over by the Highway Patrol.
Many of the stunts performed by the teams in the national competition, including all stunts more than two bodies high, the fly-overs, and the basket-tosses with head-over-heels rotation, are illegal at the high school level according to the National Federation Interscholastic Spirit Association.
The Advanced Chemistry textbook that Cliff is studying is not a real book at all. The PHD writer is actually the Assistant Propmaster's name. Though not real, the book is credited at the end of the film as an actual book that was cleared for use.
The high school pictured in the movie is actually San Diego State University. A statue of the founder of the university can be seen in the shot at Missy's car before Torrance and Missy go to see the Clovers.
The Toros gym scenes were filmed at San Diego all girls Catholic school Academy of Our Lady of Peace (OLP). OLP cheerleaders cheer for OLP as the Pilots and for their brother school, all boys Catholic school St. Augustine (STA). Real OLP/STA cheerleaders can be seen in the movie at the regionals and nationals in their Saints cheer uniforms. They are shown at regionals after the Broncos praying and at nationals, sitting next to the Clovers as they announce the winners.
Eliza Dushku and Clare Kramer (Missy and Courtney) were both on the T.V. series Buffy the Vampire Slayer at one point. Eliza was Faith, a second vampire slayer gone bad girl in season three. Clare was the goddess Glory who takes Buffy's sister to open a portal to hell. Nicole Bilderback (Whitney) also cameoed in a couple of episodes in season three as a Cordette.
During the first football game scene, the male cheerleaders behind Missy (Eliza Dushku) are not making the Torro "bull" hand signal like the rest of the cheer team. Instead, they are making "the shocker" hand signal.