Ideological indoctrination and successful public education don't mix

The way to fix badly failing high schools in high-poverty urban areas is NOT to introduce an ideological theme, whether it is left- or right-wing.  Students at this beleaguered high school were subject to a "social justice" approach which included out-of-state field trips to explore civil rights issues.  As this was going on, achievement test scores fell.  Needless to say, that principal is no longer there.  Where do they find these people?