These lists rank districts against each other, not the schools inside them. To rank individual schools within a state, county, or city, use the school rankings; to compare whole counties, see the county rankings.
Districts need at least 2 schools and 500 students to appear. Shares are computed from raw student head counts, proficiency is enrollment-weighted and only shown where reporting schools cover most of a district's enrollment, and staffing ratios exclude special-services and vocational cooperatives, whose federally mandated staffing is not comparable.