Here you can find more information about sources for data used to develop Education Equality Index findings.

Data Sources

+ National Free or Reduced Price Lunch Figures

U.S. Department of Education, National Center for Education Statistics, Common Core of Data (CCD), “Public Elementary/Secondary School Universe Survey,” 2010-11, 2011-12, 2012-13, 2013-14, 2014-15.

+ School Level, Grade Ranges, and Magnet / Charter Classification

U.S. Department of Education, National Center for Education Statistics, Common Core of Data (CCD), “Public Elementary/Secondary School Universe Survey,” 2010-11, 2011-12, 2012-13, 2013-14, 2014-15.

+ Number of Students Tested

This information was provided to GreatSchools by state education agencies.

  • 2015 EEI scores use 2015 numbers of students tested as reported by state education agencies.
  • 2014 EEI scores use 2014 numbers of students tested as reported by state education agencies.
  • 2013 EEI scores use 2013 numbers of students tested as reported by state education agencies.
  • 2012 EEI scores use 2012 numbers of students tested as reported by state education agencies.
  • 2011 EEI scores uses 2011 numbers of students tested as reported by state education agencies.
+ Student Proficiency

Student proficiency on state assessments at the subject/grade level is required to be made publicly available under federal law. Student proficiency at the subject/grade level by income subgroup was provided to GreatSchools by state education agencies.

Student proficiency on the National Assessment of Educational Progress was collected from the U.S. Department of Education, National Center for Education Statistics “NAEP Data Explorer”.

+ City Population Figures

Annual Estimates of the Resident Population for Incorporated Places of 50,000 or More, Ranked by July 1, 2015

Population: April 1, 2010 to July 1, 2015
Source: U.S. Census Bureau, Population Division
Release Date: May 2016

School-aged population estimates calculated using 2015 American Community Survey city population totals and 2010 Census city population percentages between ages 5 and 18.