Environmental Education Resources - Comprehensive directory of environmental educational resources for all audiences and age levels, from the Center for the National Institute for the Environment
SEEK:Sharing Environmental Education Knowledge - Minnesota's interactive directory of environmental education resources lists events, curriculum resources, learning centers, and other resources.
EE-Link - An Environmental Education Resource for Teachers - Directory of Internet resources intended to support, enhance and extend effective environmental education in grades K-12. Includes classroom materials, publications, information on grants, and general environmental links.