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Office of Educational Research and Improvement (ED), Washington, DC. National Diffusion Network. – 1987
The National Diffusion Network (NDN) is a federally funded system that makes exemplary educational programs available for use by schools, colleges, and other institutions. This publication contains information describing the science education programs currently in the NDN, along with procedural information on how to access these programs. The…
Descriptors: Biology, Chemistry, Conservation (Environment), Demonstration Programs