This planning technique is a group version of mind mapping; I use this system of visual note taking all the time to capture memories and ideas. Tony Buzan developed mind mapping in Britain a number of years ago; it’s used a lot more in Europe, but a good friend of mine used it in graduate school for everything from notetaking to planning for her thesis.
Word Webbing, described on page 20 in the “Planning and Reflection” book from HIGH/SCOPE, gives the whole group a chance to participate in a giant mind map. The group has a giant sheet of butcher paper and markers. Begin the web or map by putting the central idea or activity in the center as a picture or a word in a frame. As the group brainstorms ideas, write broad categories, and then more specific item in branches off the central idea. As you go, connect the ideas that are related. When done, you have a picture of their discussion and can see how items are connected.