The shirt actor Zack Bennett is wearing in the scene in which he tells Eliza that he got a job, is a Cast/Crew shirt from producer Sean Michael Beyer's feature film "Down The PCH".
Michael tells Eliza that he got a job at Sampson's. Sampson being the name of the evil drug overlord in the movie Half Baked, in which Guillermo Diaz also starred.
In order to fill up seats in the classroom scene, several extras were recruited at the last minute from a nearby flea market.