This report is the first in a series by the National Council on Teacher Quality (NCTQ) that examines the current status of states' teacher policies. Updated on a two-year cycle, each will cover a specific area of teacher policy. This report focuses on state teacher policies governing what states require in evaluations of both teachers and principals. These reports are all drawn from data collected for NCTQ's State Teacher Policy Database (STPD), where the full breadth of states' teacher policies are captured and updated on a two-year cycle. They serve the important purpose of highlighting key trends across the nation on teacher policies, showing where the 50 states and the District of Columbia stand relative to one another. This report and the two that follow replace NCTQ's long-running "State Teacher Policy Yearbook." [Kelli Lakis and Lisa Staresina provided research support to this project.]