Can a public high school force you to wear skirt or dress graduation?

No, a public high school in the United States cannot force a student to wear a skirt or dress for graduation. Public schools are generally prohibited from enforcing dress codes that discriminate based on sex. Forcing students to wear gender-specific clothing would violate this principle, as well as potentially violating Title IX (which prohibits sex-based discrimination in schools). While schools can set guidelines for graduation attire (e.g., requiring certain colors or styles), those guidelines must be gender-neutral and cannot compel students to wear clothing that doesn't align with their gender identity or personal preference.