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Subject
- Educational technology--United States--Evaluation1
- Federal aid to education--United States1
- Knowledge Applications Division1
- Mathematics--Study and teaching--United States1
- Media programs (Education)--United States1
- Office of Educational Research and Improvement--Databases1
- Office of Libraries and Learning Technologies1
- Office of Reform Assistance and Dissemination1
- Playgrounds--United States--Equipment and supplies1
- Playgrounds--United States--Safety measures1
- Private schools--United States1
- Public schools--United States1
- Regional educational laboratories--United States1
- Regional educational laboratories--United States--Directories1
- School children--Social conditions1
- School management and organization--United States1
- Science--Study and teaching--United States1
- Social skills in children1