Freshwater

• http://environment.nationalgeographic.com/environment/habitats/freshwater-profile.html (General Information)
• http://www.mbgnet.net/fresh/rivers/index.htm (Major rivers)
• http://www.mbgnet.net/fresh/lakes/index.htm (Major lakes)
• http://environment.nationalgeographic.com/environment/habitats/freshwater-map.html

• http://www.thewildclassroom.com/biomes/lake.html

Organisms and organism interactions

• http://www.mbgnet.net/fresh/rivers/index.htm (River and streams animals)
• http://www.mbgnet.net/fresh/lakes/index.htm (Lake and pond animals)
• http://www.naturegrid.org.uk/pondexplorer/pond-cross.html

• http://environment.nationalgeographic.com/environment/photos/freshwater-plants-animals.html 

Symbiosis

• http://nhs.needham.k12.ma.us/cur/bio_99/p5/sf_js_p5/freshwater.htm

• http://www.fw.vt.edu/dendro/Forsite/studentpages/JenniferAquaticFoodWebsb.htm

Travel Information

• http://www.experiencemississippiriver.com/
• http://iguide.travel/Great_Lakes
• http://www.thewildclassroom.com/biomes/travelinfo/lake.html

• http://environment.nationalgeographic.com/environment/habitats/freshwater-threats.html
• http://environment.nationalgeographic.com/environment/photos/freshwater-threatened.html
• http://videos.howstuffworks.com/hsw/10187-water-human-impact-on-freshwater-wetlands-video.htm (Video)