"...a site which provides access to resources and tools to support teaching and learning (from K-16) in the areas of science, technology, engineering, and mathematics" Kathy Schrock's Guide for Educators on Discovery Education, December 2007.
"NSDL created Science Literacy Maps as a tool for teachers and students to find NSDL resources that relate to specific science and math concepts. These maps illustrate connections between concepts as well as how concepts build upon one another across grade levels." A helpful aspect of this tool for elementary school teachers is that the literacy maps are sectioned by levels: 9-12, 6-8, 3-5, and K-2.