Steps Toward a Formative Evaluation of NSDL

This report presents results of a preliminary assessment of the National Science Foundation's National Science Digital Library/Distributed Learning (NSDL) program based largely on existing data and makes recommendations for the design of a full formative evaluation. The authors explore the state of health of the STEM resource collections, the availability of web metrics to probe their use, and the potential usability and impact of NSDL-funded materials on STEM teaching and learning.