Penn Course Review (PCR) is made by Penn students and it provides numerical ratings and metrics for undergraduate courses and professors at the University of Pennsylvania. This site also allows you to search for professors and courses to see how past students rated the quality, etc. However, it integrates the most up-to-date information from the registrar. PCR uses data from course evaluations to provide course ratings on instructor quality, and course quality. This review site has a long history of being a valuable and influential guide for course selection.