Blended learning is a formal education program in which a student learns at least in part through delivery of content and instruction via digital and online media with some element of student control over time, place, path, or pace. wikipedia 
Teaching Machines (Ward Cunningham) where I joined Audrey Watters' class in federated wiki.
About Roster Plugin and our developing support for advancing cohorts of learners. github
Learning and Knowing with Federated Wiki at Open Source Bridge 2015. session