Leaves that fall into streams form natural leaf packs that provide food for aquatic organisms. Participants create artificial leaf packs and place them in a stream for three to four weeks. The leaf packs are retrieved from the stream and examined in the classroom... ...leading to the discovery of aquatic macroinvertebrates that indicate stream health. Schools enter their data into the online Leaf Pack database to share with the public. LPN experiments teach the importance of streamside forests and promote their stewardship.
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The Leaf Pack Network® (LPN) is a network of citizens, teachers, and students investigating their local stream ecosystems. Using the Leaf Pack Experiment Kit, participants:

Interested in connecting your classroom to the outdoors? Here’s how to get started!

Attention Leaf Pack Network® Participants

We are updating our method of communicating with the Leaf Pack Network®.

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Jump Into These Links!

Anyone interested in learning about riparian communities can use the resources available on the Leaf Pack Network®. Navigate the LPN website using the menu on the left, or start with these pages:

View data from a particular stream. Search by major watershed or school.

Visit our learning center to learn about watersheds, the link between trees and streams, macroinvertebrates, or data analysis.

Explore interesting resources from Stroud Water Research Center and other organizations that provide information about rivers and streams.

For a detailed look at the Leaf Pack Network, view our eight minute video.