from http://science-class.net/archive/science-class/Ecology/Resources.htm
These resources are generally appropriate for grades 5 - 9. In some cases they have been classified by grade level.
The groupings are general and somewhat arbitrary. As with anything in education; your milage may vary.
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Mostly for Teachers
Mostly for Students
Elementary School
Middle School
What are the advantages of alternative energy sources?
When is water safe to drink?
Middle School - HIgh School
For Teachers & Students
Fossil Fuels (Edquest)
Conserving Fossil Fuels (Edquest)