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Download full textLee, Carolyn S., Comp. – 1991
The National Diffusion Network (NDN) was established in 1974 through the Office of Educational Research and Improvement upon the belief that there are few difficulties encountered by school systems that have not been solved successfully in some other location. The primary function of the NDN is to disseminate information about a wide array of…
Descriptors: Curriculum Development, Demonstration Programs, Elementary School Mathematics, Elementary Secondary Education
