The "Classic Articles in Context" (CAC) project of the National Science Digital Library integrates landmark works of scientific inquiry into dynamic learning spaces for teachers and learners using the NSDL Wiki that plugs CAC resources into the NSDL Data Repository that is part of the NCore platform. CAC is a new kind of scholarly publication developed with Web 2.0 technology that illustrates science as a process that builds, and often turns, on discovery and replication expressed in the archival literature of empirical findings. NSDL works with publishers to make full texts of select "classic" articles available to patrons whether or not they or their institution holds a subscription to the peer-reviewed journals in which the articles appeared. Every paper featured in a CAC topical concentration includes a narrative essay that provides an contextual overview of the investigation suitable for undergraduate science courses. The essays point out significant aspects of the studies such as novel experimental methods and relevant research of the time.