Resources for Grades 3-5 Activity – Tree Cookies

One way to learn about tree growth is to look at annual rings. Tree rings show patterns of change in the tree’s life, as well as changes in the area where it grows. Students will trace environmental and historical changes using a cross-section of a tree, or “tree cookie.”

For the complete activity and more like this, purchase the Explore Your Environment: K-8 Activity Guide at and/or attend a professional development training in your state.

Below are some supporting resources for this activity.


Download the copyright-free student pages that are included with this activity:

Tree Rings (PDF)

Reading Tree Cookies (PDF)

Tale of Two Trees (PDF)


Spanish Student Page(s):

Anillos de árbol (PDF)

Leyendo Galletas de árbol (PDF)

Cuentos de dos árboles (PDF)


Expand your students’ learning and imaginations. Help students meet their reading goals, while building upon concepts learned in this activity, with the following children’s book recommendations:


Try a simple variation of this activity to engage children in the outdoors at home. Download this fun and easy-to-do family activity.


The following tools and resources may be used to enhance the activity.

  • Video: How Does a Tree Grow? Hint: It’s Not What You Think

    How Does a Tree Grow? Hint: It’s Not What You Think.” This 7:06-minute video describes how a tree’s twigs, trunk, and branches grow longer and fatter, explains how to count tree rings on a tree cookie, and shows some different stories a tree cookie might reveal.

  • Video: Crowns, Trunks, and Roots!

    Crowns, Trunks, and Roots!” This 5:36-minute video examines how the trunks, crowns, and roots of trees work together to support the tree. This video is one of a series of BeLeaf It or Not! videos by Michigan State University Extension, which are geared for students.

  • Remote Ready Student Pages

    Google Slides and Docs are great tools for facilitating remote learning and student collaboration. They can be integrated into Google Classroom or other e-learning platforms. Check Tree Cookies for our remote-ready educator instructions and student pages.

    Please note: Resources are available as view only and require that you make a copy to your own Drive in order to edit and share with your students. To learn how, watch this demo.

  • Video Demo: Tree Cookie

    Watch the Tree Cookie Demonstration video (12 minutes). PLT’s Tree Cookies engages students in investigating the patterns of growth in trees. With only some art supplies and creativity, students can become their own tree detectives. This video was developed by Anita Smith, PLT Facilitator in Maine.

  • What Can Trees Tell Us About Climate Change?

    Learn about the connection between trees and climate change, how tree rings can tell a story about past weather events, and the methods by which scientists are recording this data. What Can Trees Tell Us About Climate Change? is a resource offered by NASA’s Climate Kids, designed for upper-elementary students. Find images, fact sheets, activities, games, and articles on this and a variety of other topics—including the atmosphere, water, energy, and weather—to help tell the story of our changing planet in ways that are accessible and engaging.

  • Tree Cookie Cross Section

    Observe annual growth rings using this Tree Cookie Cross Section of a 102-year-old ponderosa pine from northwest Nebraska to learn about the many changes in a tree’s lifetime. Early on, the ring widths show average growth for a tree in arid northwest Nebraska but they began to narrow considerably when the tree was about 20 years old. Too many trees in this area of forest were competing for the same limited supply of resources. A timber harvest in 1927 removed some of the trees, reducing competition, and this ponderosa pine increased its growth as a result. When the drought of the 1930s struck, this once again reduced the available resources for this tree, as evidenced in the reduced ring widths.

    Also check out what a delegation of Girl Scouts from Poland discovered when asked “What happened around 1917 that might have changed the way this tree grew?” when they looked at this Western Red Cedar tree cookie at the World Scout Jamboree.

  • Tree Rings Simulation

    The science of tree rings is called dendrochronology. Tree rings help scientists learn about past climates by decoding tree ring patterns. Climate scientists use clues from ice cores, layered sediment deposits in lakes and seas, the structure of coral reefs, as well as tree ring sequences to learn about paleoclimates. The use of tree ring records to decode Earth’s climate history is called dendroclimatology. Use this interactive Tree Rings Simulation by the University Corporation for Atmospheric Research, Center for Science Education to learn what tree ring patterns can tell us about climate conditions in the past.

  • Places Where You Can Buy Tree Cookies

    These two websites are places where tree cookies can be purchased:


  • Tree Cookies Information

    Want to have some tree cookies for you own?  Use this handy document that lays out the steps for creating a perfect tree cookie. You can read the article In Search of the Perfect Tree Cookie for even more information.

  • Inner Parts of A Tree Model

    Help students visualize the inner layers of a tree trunk and better understand the function of its different parts by creating this easy-to-make visual aid – a cross-section of a tree trunk.

  • A Machine That Turns a Tree’s Rings into a Musical Score

    Learn about a modified record player that reads growth rings from a tree like musical notes. Created by German artist, this machine uses the annual rings that you find in cross-sections of trees and converts them into piano music.