The National Science Resources Center (NSRC) offers regional, national, and international science education programs, as well as technical assistance, through its three integrated Centers of Excellence. This guide describes NSRC's curricula for grades K-8, how they correlate with national content standards, and how they can be integrated with non-science curricula. A materials guide describes materials available through NSRC that correspond with curriculum units or are designed to aid in professional development. (Includes Index.)