BlendKit is a 5-week course designed by the University of Central Florida in an open, online format specifically for the professional development of higher education faculty and designers preparing to design and teach blended learning courses. The evaluation of this course provides us with interesting and valuable information on the success of using an open approach of a MOOC compared to more traditional, highly structured professional development offerings typically seen in higher education. This article will focus on the lessons learned from the third iteration of this open, online course.