I work with teachers, other educators and community partners who are using natural/social systems interactions to develop foci for community-based investigations for environment based learning. Systems thinking is a new approach for many of them. I would like to like to provide them with some references that would give an introduction and an overview to systems thinking in a language and at a level for professionals who may not be experienced in this area. I would appreciate any assistance that you or any of the contributors may be able to provide.