You may like to investigate this web based tool…
“Trackstar is your starting point for online lessons and activities. Simply collect Web sites, enter them into TrackStar, add annotations for your students, and you have an interactive, online lesson called a Track. Create your own Track or use one of the hundreds of thousands already made by other educators. Search the database by subject, grade, or theme and standard for a quick and easy activity. There is a fun Track already made for each day of the year, too!”
I have used a nifty little free mind mapping tool called Freemind lately. The download link is further down the page. Mac and Windows.
