The relevance tree shown here for health services and materials is not comprehensive, but illustrates the use of the technique for relating national or other broad goals to pertinent needs in research. Additional pathways between basic research and broad goals have been omitted for the sake of simplicity. Also omitted is the time scale: research on materials, for example, might not begin feeding information upward for 10 years or more.
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National Concerns and Technical Challenges ."
Materials and Man's Needs: Materials Science and Engineering . Washington, DC: The National Academies Press,
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As of 2013, the National Science Education Standards have been replaced by the Next Generation Science Standards (NGSS), available as a print book, free PDF download, and online with our OpenBook platform.
The NGSS offer a detailed description of the key scientific ideas and practices that all students should learn by the time they graduate from high school. The standards are based largely on the 2011 National Research Council report A Framework for K-12 Science Education: Practices, Crosscutting Concepts, and Core Ideas.