How Dirt Works
Lesson plan with video, grades 3–8
Soil sustains plant and animal life, regulates water, filters pollutants, cycles nutrients and supports structures. In this lesson, students learn the value of soil and its role as a natural resource. Students investigate how humans and many other organisms rely on soil and explore why it is important to monitor and maintain the health of soil. They also learn how agriculture, home building and road construction change the land in ways different from how nature changes the land.
Published November 2013, updated July 2016