Breaking Boundaries With HyFlex Course Design — from onlinelearningconsortium.org by  Dr. Brian Beatty, Associate Professor of Instructional Technologies in the Department of Equity, Leadership Studies and Instructional Technologies at San Francisco State University

Teaching a HyFlex class is not twice or three times the work of teaching a single-mode class. If you build a comprehensive course (the asynchronous online version) you can use that to teach in all modes. Build once, teach with the same materials in all modes.

Also see Brian’s new website — with accompany blog — at HyFlex Learning Community. 

Some example postings: