This website is supported by a grant from the Radiological Society of North America’s Research & Educational Foundation. It seeks to provide an introduction to prostate MRI interpretation, including the use of the Prostate Imaging Reporting and Data System (PI-RADS). At the core of the website is a collection of approximately 50 teaching cases. Each case includes a set of scrollable multi-parametric MR data sets, accessible via one’s browser. Learners may take these cases as unknowns and subsequently review annotated solutions to receive feedback. Supplemental material includes an introductory lecture as well as links to background reading on the topic.