I'm glad that I found this interesting thread. Just a idea, have anyone thought of creating a moodle "course format" (instead of a question type) for "concept map?" So, instructors can use this Moodle "course format" to easily plan the activities (quizzes, assignments, etc.) and create conditions (e.g. pass the first quiz with 80%) that will lead to the next event/activity. I think it would be very helpful for instrutcors (and students) who tend to be "visual" learners.. Thoughts or comments?