I just started using Dabbleboard with my students to help them think about how they are going to organize their research. Never before have I had students so excited to do a pre-research activity! I almost had to pinch myself at the positive student response.
For very broad topics, such as the Revolutionary War, creating a map to plan research can help students develop sub-topics. These sub-topics could be used to narrow their research topic or to help them create areas of focus for their research. Depending on the age and/or ability of your students, the Dabbleboard could be completed as a class, in pairs, or as an individual.
Also, the map gives them a structure to use in their note-taking. Anything that helps students in their organization cannot be a bad thing:)
There are a lot of other great ways Dabbleboard could be used. I think it would be great for students to create charts comparing two topics/ideas. Here is an example I created on Dabbleboard comparing McCain and Obama.