In most parts of the world, water is a scarce resource. That might seem strange, because there is so much water on Earth. Almost all of the water on Earth, more than 97 percent of it, is seawater in the oceans. The rest is called fresh water, because it does not have a high salt content. Most of the world’s fresh water is frozen solid in large glaciers in Antarctica and Greenland. Almost all of the fresh water that is available for human use is either contained in soil and rock below the surface, called groundwater, or in rivers and lakes.

Teaching Resources from the Education Resources Network

Curricula & Instruction Resources

Ripples on a sandy beach in southern Alaska
Resource Type: Classroom Activities

This creative lesson plan provides a visual way for learners to gain knowledge about the finite...

Students taking water samples during field work
Resource Type: Classroom Activities

On this website, K-college educators and students can access a table of annotated links...

Chemical plant
Resource Type: Classroom Activities

Students are introduced to the concept of air quality by investigating the composition,...


Teaching Media Resources

Mammatus Clouds
Resource Type: Videos or Animations

Watch this video and learn how clouds are created and cool facts about them.

Crystallizing salt
Resource Type: Videos or Animations

Video and Animation collection on the following topics: biology, climate change, geography and...

Great Falls Park on the Potomac River, Maryland
Resource Type: Virtual Field Trips

On this field trip, you'll learn amazing things about water. You'll learn about aquifers, how...


Outreach Programs

Black sand beach, Hawaii
Resource Type: Online Outreach Programs

Maps on Hawaii's water and geology; Location: Honolulu, Hawaii

Inspecting wind-eroded soil
Resource Type: Online Outreach Programs

Data and maps, research, reports, fact sheets; Location: Iowa City, IA

Sediments in Lake Red Rock, Iowa
Resource Type: Location-based Outreach Programs

Volunteer water monitoring, volunteer cleanups; Location: Atlanta, GA