To update its teaching and departmental review processes, Phillips Academy Andover, an independent boarding school in Massachusetts, commissioned RAND Corporation researchers to review the school's policies, conduct a literature review, interview other independent high schools, develop potential recommendations for revision of Andover's processes, and revise those recommendations after vetting them with Andover's faculty. This report summarizes their work. The report is intended primarily for Andover administrators and teachers to guide their revision of their teaching and departmental review processes, but it also provides relevant research that independent schools can use to inform their design of teaching and departmental review policies. To help readers understand how proposed changes may or may not work in different contexts, the report includes Andover teachers' reactions to initial potential recommendations, the authors' subsequent revisions to the recommendations based on teacher's feedback, and Andover administrators' reactions to the authors' final recommendations. [This study was funded by Phillips Academy Andover.]