This article on problem-based learning (PBL) explores the advantages of its use as a teaching/learning strategy for introducing information literacy to students. The author reviews the various methods presented in the literature for integrating PBL and information literacy, examines the unique challenges PBL presents for instructors, librarians, library instruction programs, and institutions, as well as presents methods for library administrators to support these efforts. This is fourth in a series on PBL and the library. (Contains 14 notes.)