14 Earth Day-related resources. That list is comprised of resources for middle school and high school setting. If you want resources for elementary school students, take a look at the offerings from PBS Learning Media.
One of PBS Learning Media's featured Earth Day lessons for elementary school students is The Dirt on Dirt. The Dirt on Dirt features Sid the Science Kid teaching children what dirt is made of, what lives in dirt, and why clean dirt is important to the Earth.
Applications for Education
The fourth video in the Dirt on Dirt series features students collecting dirt and recording their observations about their samples. You could do this at school or you might consider adding it to your classroom website or newsletter as an activity suggestion to parents who want to continue in-class lessons at home with their children.