Curated OER
Water Purification
Students use the example of natural water purification to show that healthy ecosystems provide services to people that are essential to life as we know it.
Curated OER
The Value of a Garden
Students explore the history of taxonomy, the work of Carl Linnaeus, and the factors involved in the decline and extinction of a variety of botanical species.
CK-12 Foundation
Ck 12: Earth Science: Protecting Water From Pollution
[Free Registration/Login may be required to access all resource tools.] How to reduce pollution and clean up polluted water.