Last November I sat down and called Robert Harrell. I very much value Robert's insights, and hard work trying to answer questions in our field. He graciously agreed to help.
The purpose of the phone call was to ask Robert some questions about the edu-buzzword "Rigor" and what it means in the world language classroom. The exchanges that transpire below helped me understand this topic much better. I've finally got around to sharing it here. Enjoy.