This is a taxonomy of various open course types. I argue that these different environments operate on three different versions of openness with entirely different goals and design implications for each environment type.
Baker III, F. W., & Surry, D. W. (2013). Open Education Designs: A Taxonomy for Differentiating and Classifying Open Learning Environments. In R. McBride & M. Searson (Eds.), Proceedings of Society for Information Technology & Teacher Education International Conference 2013 (pp. 189-194). Chesapeake, VA: AACE. Retrieved from http://m.site.aace.org/papers/37888/