What does it mean to be a K-12 teacher in the 21st Century? Michigan Virtual University and Kent State University are collaborating to offer a massive open online course (MOOC) that will explore teaching in the 21st century. This course will provide a study of the pedagogical practices, contexts (online, face-to-face, and blended), and the technologies involved in reform-oriented K-12 instruction. The unique feature of this MOOC is the audience. The goal of this course is to start a conversation with participants from multiple ages and backgrounds who share a common passion for teaching; therefore, this MOOC is directed at three audiences: 9-12 students who are interested in becoming teachers, collegiate-level pre-service teachers, and existing, in-service teachers in the K-12 system. This five week experience (October 7 to November 8) will provide participants with a) pathways to continued professional development; b) strategies for using personalization, collaboration, and reflection in the classroom; and c) innovative and free technologies to support pedagogical classroom goals. Specifically, this course will be exploring current conceptions of teaching, how to personalize learning, tools for collaboration amongst teachers and students, and reflective opportunities to facilitate growth.