This document discusses the benefits of openness in education through open educational resources (OER), open courseware, and open courses. It argues that openness is necessary for education, as sharing knowledge is how education occurs. Openness combined with educational data allows for continuous quality improvement through processes like strategic tutoring. While openness of materials is important, open licensing that allows reuse, redistribution, revision and remixing of content is also needed to fully realize these benefits. When implemented, openness can help address issues like college affordability while benefiting students, teachers, institutions, and society through opportunities like lifelong learning.