National Science Digital Library (NSDL)

The National Science Digital Library provides high quality online educational resources for teaching and learning, with current emphasis on the sciences, technology, engineering, and mathematics (STEM) disciplines—both formal and informal, institutional and individual, in local, state, national, and international educational settings. We help the education community to organize, manage, reuse, and disseminate digital educational content to advance STEM teaching and learning.

The NSDL is made up of information about thousands of high-quality online educational resources. This information comes from users like you, and is organized into metadata records. NSDL does not hold content directly—instead, we provide structured descriptive information (metadata) about web-based educational resources held on other sites by their providers, who contribute this metadata to NSDL for organized search and open access to educational resources via and its services.