Welcome to our website’s resource library, where we offer an extensive collection of free science materials tailored for K-12 students. Dive into a wealth of educational resources including articles, activities, lesson plans, learning modules, and much more. All materials are free to download!

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  • The cover for the 'Tale of Two Caves' article. The main image is a photo of a person standing in a small passageway of a cave.
    Caves are important natural features in Sequoia and Kings Canyon National Parks in California. Past studies of some of these…
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    A Tale of Two Caves: How Is Hurricane Crawl Cave Different From Crystal Cave?

  • PDF preview of the alternate FACTivity for the Under Where? article
    The purpose of this FACTivity is to demonstrate how house plants use water and compare this process with an outdoor…
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    Alternate FACTivity – Under Where?

  • The scientists in this study developed a process to help managers identify management priorities. As conditions change over time, the…
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    At Your Service: Developing Models to Help Natural Resource Managers Make Better Decisions

  • PDF preview of the Busy Bee Word Challenge
    Help Busy Bee complete each statement by filling in the blanks for missing words. Use what you’ve learned about watersheds,…
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    Busy Bee Word Challenge – Full Throttle Model

  • Caribbean Cruise cover for the article. The main image is of a stream bed.
    Particulate organic matter (POM), which consists of small pieces of twigs, leaves, soil, and other items found in the water,…
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    Caribbean Cruise: Examining the Movement and Quality of Organic Matter Over Time From Two Caribbean Watersheds

  • Caves LIVE a Distance Learning Adventure
    A world of wonder awaits just below the surface, and this distance learning adventure explores these amazing places. Specially adapted…
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    Caves LIVE

  • PDF Preview of Crossword for Food for the Soil
    Test your knowledge on alluvial soil, watersheds, and fish.
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    Crossword – Food for the Soil

  • PDF preview of Freshwater crossword.
    Test your knowledge on contamination, floodplains, and watersheds.
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    Crossword – Freshwater

  • The cover of "Did They Make the Gradient?" featuring a black and white photo of a flume installed in a stream to measure streamflow.
    If the temperature of a stream rises too high, the animals that live in the stream may find it difficult…
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    Did They Make the Gradient? Climate and Stream Temperatures Now and Into the Future

  • Cover for Don't Litter the Stream. It's a photo of a stream in a very green wooded area.
    From 1920 to 1950, a tree species called albizia (Falcataria moluccana) was brought to Hawai‘i from islands located north and…
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    Don’t Litter the Stream: An Invasive Tree Species and a Hawaiian Stream Food Web

  • PDF preview of Caves and Karst eyeChallenge showing a selection of images from the edition.
    After reading the Caves and Karst Edition of Natural Inquirer, test your knowledge with an eyeChallenge. Examine each image taken…
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    eyeChallenge – Caves and Karst

  • PDF preview of the eyeChallenge for Cream of the Crop
    After reading “Cream of the Crop,” test your knowledge with an eyeChallenge. Each of the following images represents something from…
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    eyeChallenge – Cream of the Crop