Participate in the NSDL

The US National Science Digital Library (NSDL) has issued a general call to participate in NSDL.  Excerpt:

NSDL encourages contributions of educational resources from NSF grant awardees, library users, community members, resource developers, content providers, educators, learners of all ages, and other collection builders. Contributions can range from individual lesson plans or websites to collections of thousands of items, to technology-based tools and services that aid educational applications of digital resources. This enlarges and strengthens the library and encourages reuse and sharing of materials....

NSDL provides access to web-based educational resources, data sets, pedagogic materials or assessments, research materials, images, graphics, photos, simulations, games, activities, curriculums, visualizations, lesson plans, collections, reports, journal articles, etc....