Missouri Citizens for Science
Grass-roots group of Missourians organized to support science in their public schools, with a special emphasis on making sure creationism is not introduced into the science classroom.
www.moscience.org
Evolution and the Nature of Science Institutes (ENSI/SENSI)
Offers a collection of classroom lessons to help high school biology teachers more effectively teach basic concepts in the areas of evolution and the nature of science.
www.indiana.edu/~ensiweb
American Society of Naturalists
Working to advance and diffuse knowledge of organic evolution and other broad biological principles so as to enhance the conceptual unification of the biological sciences.
www.amnat.org