Schools are supposed to be the great equalizers. Yet it is far too difficult to tell which cities or states do the most to ensure that all children receive equitable access to strong public schools.
That’s why Education Cities, in partnership with GreatSchools, is proud to announce today’s launch of the first national comparative measure of the achievement gap between students from low-income families and their more advantaged peers.
The Education Equality Index is powered by what we believe is the largest collection of income-focused student proficiency data ever gathered. The data span forty-two states, fifteen thousand cities, seventy-eight thousand schools, and forty-three million children.
With these data in hand, we developed a methodology to measure and compare schools, cities, and states. At each level, we measure the gap between the proportion of students from low-income families who are proficient on a state assessment and the proportion of all students across the state who are proficient on the same assessment.
We are not measuring within-school or within-city achievement gaps; we are comparing the performance of students from low-income families at the school level to the average performance of all students at the state level. We then assign each school a...