Created by educators for educators, Perusall is a social learning platform that aims to improve learning outcomes by promoting student engagement and collaboration with all types of course content. In 2015, Perusall was launched following a major four-year research project at Harvard University. Since then, Perusall’s efficacy as a learning technology has been tested by more than 4,000,000 students at 5,500 schools, colleges, and universities in 112 countries.