These websites include lesson plans on several environmental subjects, including rivers and waterways. They also include links to many other resources that may prove useful.
Thinkfinity has lots of resources available. The link here directs you to water pollution lesson plans for grades 3-8, but feel free to search other terms.
Environmental Awareness Activities for Librarians and Teachers: 20 Interdisciplinary Units for Use in Grades 2-8 by Martha Seif Simpson
Global Climate Change: Resources for Environmental Literacy by National Science Teachers Association
Water Conservation. Perf. Lake Jackson Intermediate School. YouTube - Broadcast Yourself. 25 Oct. 2009. Web. 10 Dec. 2010. <http://www.youtube.com/watch?v=bqqcLAU364E>.
This site provides links to many resources, including lesson plans and toolkits for teachers.
This site provides lesson plans on environmental issues for all grade levels created by Penn State.
