Here are some web sites that contain graphic organizers. They can be used in all subjects!

http://www.ncrel.org/sdrs/areas/issues/students/learning/lr1anti.htm

http://teachervision.com/tv/curriculum/printables/graphics.html

http://www.eduplace.com/rdg/hme/k_5/graphorg/index.html

http://www.teach-nology.com/web_tools/graphic_org

http://www.venndiagram.com/venn01.html

http://eduplace.com/kids/hme/graphorg