From the National FFA Organization (also known as Future Farmers of America):
The Drinking Water: Protecting the Source instructional materials were developed to assist teachers who seek to enhance the consciousness of their students about where their drinking water comes from, and how sources of drinking water can be protected. The teaching materials are designed to supplement existing instruction in agriculture, food and natural resources courses. They serve as independent units of instruction on source water and as “hands-on” learning activities to enliven the educational experience for students and teachers.
The instructional materials are related to water characteristics and contaminants, water regulations, drainage, and reducing the flow of nutrients into groundwater and surface water.
There are 20 lessons in all on topics ranging from "What is the source of my drinking water?" to "Climate Change Impacts on Agricultural Water Resources."
Go to the site to get the lessons [1]