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

Data Sources for the U.S.

+ 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,” 2000-01, 2010-11, 2011-12, and 2012-13.

+ U.S. Population

Monthly Population Estimates for the United States: April 1, 2010 to December 1, 2016. Release Date: December 2015.

Data Sources for States

+ State Population

Annual Estimates of the Resident Population for the United States, Regions, States, and Puerto Rico: April 1, 2010 to July 1, 2015 (NST-EST2015-01). Release Date: December 2015.

+ State 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,” 2000-01, 2010-11, 2011-12 and 2012-13.

+ State EEI Score Disclaimer

State-level EEI scores are not the best way to compare states because their absolute EEI scores are highly correlated to the percentage of students in the state who qualify for free and reduced-price lunch. They are helpful when determining how cities within a specific state performed compared to the state average and for noting state trajectories.

Data Sources for Cities

+ City Population

Annual Estimates of the Resident Population for Incorporated Places of 50,000 or More, Ranked by July 1, 2014 Population: April 1, 2010 to July 1, 2014. Release Date: May 2015.

+ City Free or Reduced Price Lunch Figures

Because this data was not provided to GreatSchools by state education agencies, this number was calculated using total school enrollment and percentage of students eligible for free or reduced lunch for the most recent year for which free or reduced price lunch data is available.

Data Sources for Schools

+ Elementary, Middle, High School Classification

National Center for Education Statistics (NCES) data from 2013-14 school year.

If school level data was missing, appropriate school level classification was added through manual search based on official grade span found in the NCES Public School search.

As a last resort, school level was added based on information found on individual school websites.

+ Magnet School Classification

National Center for Education Statistics (NCES) data from 2013-14 school year.

+ Number of Students Tested

This information was provided to GreatSchools 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.
+ School Free or Reduced Price Lunch Figures

This information was provided to GreatSchools by state education agencies for the most recent year for which free or reduced price lunch data is available.

+ School Grade Range

National Center for Education Statistics (NCES) data from 2013-14 school year.

If school grade range data was missing, appropriate school grade was added based on information found in the NCES Public School search.

+ Student Proficiency

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

+ Student Proficiency by Income Subgroup

Student proficiency at the subject/grade level by income subgroup was provided to GreatSchools by state education agencies.

State Data Exceptions

+ California

The California Department of Education did not record 2014 test results during transition to Smarter Balanced Assessment System. Therefore, 2013 scores were used in place of nonexistent 2014 scores.

+ Illinois

The Illinois State Board of Education reports charter management organization data as an overall average instead of by individual schools. Therefore, the Education Equality Index does not include lists of individual schools for Illinois cities.

+ Nevada

The Nevada Department of Education reports charter management organization data as an overall average instead of by individual schools. Therefore, the Education Equality Index does not include lists of individual schools for Nevada cities.

+ Pennsylvania

Elementary schools in Pennsylvania are not included in the EEI. The Philadelphia Department of Education does not report FRL student proficiency for assessments at the elementary school level.

City Data Exceptions

+ Washington, DC

Washington, DC Education Equality Index scores were calculated by comparing low-income student proficiency in DC to all students in DC. All other city scores were calculated by comparing low-income students in the city to all students in their state.

In the future, with 2015 PARCC assessment data, DC students will be compared to other states also using the PARCC assessment.

More Questions?

Explore our FAQ. For more information, contact Christine Schneider at (312) 835-3925 or press@educationequalityindex.org.