The National Science Education Standards is one of the foundational documents in science education, defining what science students should know and be able to do to become educated citizens. The NSES serve as the basis for state science standards and curriculum frameworks across the country. In addition, the Standards are identified by the Science Committee of the National Governing Board as one of the core documents underlying the framework for both the 2005 and the upcoming 2009 NAEP Science assessment. As states develop measures of proficiency in science, the National Science Education Standards will be an essential resource. The document can be accessed here.