Through a series of six guided classroom discoveries, students create, via targeted questions, a definition for deciding when two sets have the same cardinality. The program begins by developing basic facts about cardinalities of finite sets. Extending two of these facts to infinite sets yields two statements on comparing infinite cardinalities…

Since 2001, librarians at Oregon State University's Valley Library have been working to build a "teaching library" supported by a clearly articulated instruction program. From the start, we believed that we needed to assess the teaching library's impact, not only to determine the success or failure of our efforts but also to demonstrate…