The Illinois Initiative on Transparency in Learning and Teaching is a grassroots assessment project designed to promote students' conscious understanding of how they learn and to enable faculty to gather, share, and promptly benefit from data about students' learning by coordinating their efforts across disciplines, institutions, and countries. Faculty rarely have opportunities to research their students' views about how their best learning happens in college or graduate school. Even less common are the means for teachers to gather such information from colleagues on a large scale and distill it into pragmatic insights about teaching practices best suited to their own particular students. The Illinois Initiative on Transparency in Learning and Teaching is a grassroots assessment project doing just that, and it demonstrably enhances students' learning. The project has two main goals: (1) to promote students' conscious understanding of how they learn; and (2) to enable faculty to gather, share, and promptly benefit from data about students' learning by coordinating their efforts across disciplines, institutions, and countries. The Illinois Initiative on Transparency in Learning and Teaching is presented in this article.