The amazing consistency of the connection between test scores and parents' income
Our friends at WBEZ partnered with the daily herald for an analysis of 10 years' worth of Illinois elementary school test score data. What they found is a relentless, strong correlation between test scores and parent income. Schools with the most students living in poverty had the lowest test scores, and vice versa. The correlation between test scores and parental income held for every income group, and it remained very consistent over time. Click through to see the graphs.
But perhaps most troubling, WBEZ and the Daily Herald find that poverty remains a frustratingly accurate predictor of how well schools will perform. Schools full of middle-class kids rarely perform below average on state tests; schools made up of low-income kids rarely score above.