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- National Association of Manufacturers (U.S.) 2
- Arlington County (Virginia) Public Schools 1
- Association for Childhood Education 1
- Association for Childhood Education International 1
- California Teachers Association, Southern Section 1
- Grossmont (California) Union High School District 1
- Jefferson County (Kentucky) Public Schools 1
- Los Angeles County (California) Superintendent of Schools 1
- Michigan State Department of Public Instruction 1
- New Mexico State Board of Education 1
- Office of the Ventura County (California) Superintendent of Schools 1
- Oklahoma. Curriculum Improvement Commission. State Committee on the Improvement of Instruction in the Social Studies 1
- Pennsylvania State Department of Public Instruction 1
- Portland (Oregon) Public Schools 1
- San Diego (California) City Schools 1
- Tufts University. Workshop on Basic Issues in Citizenship 1
- Zeal for Democracy Committee 1