A 'mini-workshop' on insights from current developments and practice in enterprise-architecture (BCS-EA conference, London, October 2012)
The main part of the presentation is split into eight 'chunks', each tackling a single 'lesson-learnt' from trying to explain EA themes to others in real-world EA practice. Each 'chunk' is timed as around two minutes of background and overview (the bulk of the slides, between the respective 'Challenge' and 'Practice'), and then four minutes pair-discussion around the questions summarised on the respective 'Practice' slide. With two minutes at the start for overall lead-in, and ten minutes at the end for general discussion about what came up for participants during the Practice sections, this fits exactly into a one-hour time-slot.
(See http://www.slideshare.net/tetradian/lessonslearnt-in-ea-articulation-worksheet for the associated worksheet.)