I use this site for finding lots of graphic organizers for all different curriculum areas and ability levels. It is great for differentiating lessons.

Copy of an old (1989) article about what graphic orgranizers are. It is interesting to see them 'newsworthy' 21 years ago knowing how popular they are now. The article itself includes many organizers.

interesting article on using graphical representations in math

Great resource of both good and bad examples of graphical representations.

I like how it is labeled 'laurels' and 'darts'. As visual consumers, we have a responsibility to be informed how graphics can be misconstrued or misleading.