This is the second in a series of three reports about the research on teaching quality that the Education Commission of the States (ECS) is producing through a grant from the U.S. Department of Education's Fund for the Improvement of Education (FIE). The focus of this report is on teacher recruitment and retention. This report is intended to guide policymakers, educators and foundation officials in their efforts to improve the quality and supply of America's teacher workforce. This report, as a starting point, presents an assessment of the current baseline of the research knowledge relating to specific questions about teacher recruitment and retention. The report is structured around the discussion of eight questions, each of which can be read independently of the others. The discussion of each question allows for both a quick summary reading (in the section called Quick Answer) and a more in-depth exploration. A Summary of Studies provides an overview of the key findings and conclusions related to each question. The following is appended: Criteria Used by Guarino et al. for Acceptance of Studies for Review. A glossary is also included. [Based upon research reviews by Cassandra Guarino, Lucrecia Santibanez, Glenn Daley, Dominic Brewer, Richard Ingersoll, and Jeffrey Kralik.]