American Forest Foundation - http://www.affoundation.org/
American Forest and Paper Association - http://www.afandpa.org/
American Forests - http://www.americanforests.org/
Association of Consulting Foresters - http://www.acf-foresters.com/
Audubon Online - http://www.audubon.org/
Backyard Conservation - http://www.nrcs.usda.gov/feature/backyard/
Backyard Wildlife Habitat - www.nwf.org/backyardwildlifehabitat/
Bernheim Arboretum and Research Forest - http://www.bernheim.org/
Daniel Boone National Forest - http://www.fs.fed.us/r8/boone/
Envirothon - http://www.envirothon.org/
Environmental Education Link (EE-Link) – http://eelink.net/pages/EE-Link+Introduction
Environmental News Network (ENN) – http://www.homeworkspot.com/reference/currentevents/enviromentalnews.htm
Environmental Protection Agency – http://www.epa.gov/
Fish and Wildlife Service - www.fws.gov
Forest History Society - www.lib.duke.edu/forest
Forestry Index – http://www.forestryindex.net/
Georgia Pacific/Educational In Nature - www.gp.com/EducationalinNature
Kentucky Woodlands Magazine - http://www.ca.uky.edu/KYWoodlandsmagazine/about.php
Kids Corner F.R.E.E. Network - http://www.freenetwork.org/kids/comes_from_trees.html
National Arbor Day Foundation – http://www.arborday.org/
National Association of State Foresters – www.stateforesters.org
National Woodland Owners Association -  www.nationalwoodlands.org/nwoa/
Natural History of Trees - www.treeguide.com
Natural Inquirer - http://www.naturalinquirer.usda.gov/
North American Association for Environmental Education – http://www.naaee.org/
Project WET - http://www.projectwet.org/
Project Wild – www.projectwild.org
Sharing Environmental Education Knowledge - http://www.seek.state.mn.us/
Smokey Bear – www.smokeybear.com
Society of American Foresters – www.safnet.org
Southern Region Extension Forestry - www.soforext.net
Temperate Forest Foundation - http://www.forestinfo.org/
The Nature Conservancy – http://www.tnc.org/
University of Kentucky/Cooperative Extension Service - www.ca.uky.edu/ces/index.htm
University of Kentucky/Department of Forestry - www.uky.edu/Agriculture/Forestry/forestry.html
USDA Forest Service (National Office) – www.fs.fed.us
USDA Forest Service Southern Research Station – www.srs.fs.fed.us