This document summarizes research on star rating systems for language teachers. It describes both primary and secondary research conducted, including online surveys of teachers and students, and interviews with academic managers. Key findings include that rating is seen as subjective, students are experienced raters, and teachers fear unfair feedback. Both teachers and students felt progress was the most important factor in evaluating a course. The conclusion is that an integrated system including ratings, reviews, and other quality indicators would be most useful for students choosing a school. Recommendations are made for how the research institution could implement a rating system.