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Author/Creator
- United States. Office of Education82
- National Center for Education Statistics43
- National Education Association of the United States35
- University of the State of New York35
- United States. Department of Education31
- Colombia. Ministerio de Educación Nacional22
- Unesco21
- New York (N.Y.). Board of Education20
- United States. Office of Educational Research and Improvement20
- Illinois. Office of the Superintendent of Public Instruction19
- Adam Matthew Digital (Firm), digitiser18
- Alabama. Dept. of Education17
- Connecticut. State Board of Education17
- Great Britain. Board of Education17
- Japan. Monbushō17
- National Education Association of the United States. Research Division17
- United States. Bureau of Education17
- American Council on Education16
- American Education Society16
- Educational Resources Information Center (U.S.)16