How does the social structure of the school reflect American society?

How is Mark Keppel High School a microcosm of American society? In other words, how does the social structure of the school reflect American society?
Discuss the irony behind the fact that the “Anglos” in the book are so eager to celebrate the “Fiesta Days” event commemorating the San Gabriel areas’ Spanish-Mexican heritage. Describe the difference between how the whites celebrated these days as opposed to the Mexicans.