If you’re a student of Russell Ackoff’s teachings, you should rapidly click yourself over to the Ackoff Center blog, where you will find a link to a rich set of video lectures with Ackoff himself:
“When the course was announced the registration requests were so high that a lottery with random drawing had to be established to admit the 25 graduate students who could attend. The course ran for 3 hours per week for 12 weeks. Russ was 84 years old.”