And, in particular – there are tools and links on the PEA website under “Harkness Outreach,” including full length regular class videos and postscript videos with the students and teachers.
A Classroom Revolution: Reflections on Harkness Learning and Teaching, edited by Jane Cadwell and Julie Quinn. An excellent collection of writings by teachers at Exeter and other schools. Yes, this is self-published by Exeter, but I really believe this is an outstanding resource.
Two pieces I’ve written:
The first is my essay for the above-mentioned collection
And a piece about efforts to support Harkness in other schools:
Teaching Around the Oval 