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Welcome to the Trans-Canadian Research and Environmental Education (TREE) website! With the TREE program, students from across Canada can be part of a national research program to study the environmental history of their own community. This program is done in partnership between the Mistik Askîwin Dendrochronology (MAD) Laboratory and the Canadian Light Source (CLS), both on the University of Saskatchewan campus in Saskatoon, Saskatchewan. 

We acknowledge that the campus is located on Treaty Six land in the traditional territories of the Nêhiyawak (Cree), Anishinabek, Lakota, Dakota and Nakota Nations, and the homeland of the Métis. As educators, we respect Indigenous Ways of Knowing and oral traditions. We dedicate ourselves to moving forward in the spirit of partnership, reconciliation, and collaboration. 

How it Works

Participation in this program requires that you commit to helping your students uncover the environmental history of the area where the sample tree grows (constructing a timeline), registering with us to schedule delivery of equipment, collecting and sending to us at least 2 trembling aspen tree cores with associated soil samples according to instructions and the timeline you have created, and then sending the kit, samples, and timeline back to us. There is no cost! The TREE program is offered with the generous support of PromoScience (a program of Natural Sciences and Engineering Research Council of Canada). We also have resources, lesson plans, and videos to aid in instruction, connecting to various curricula!

  • Join our Research Team as they study tree growth and the connection to chemical composition in trembling aspen tree cores and soil near the tree.

  • Connect this data to a timeline of environmental events that have impacted the tree sampled. See our data pages or Module 2 for timeline info!

  • View resources and lessons plans, easily adapted to suit Gr. 6-12 sciences, math, social studies, and land-based courses!
  • Check out our instructional videos as well!
  • Connect with us and we can work with you on adapting, making a connection to the researchers, or setting up a virtual session for your students!



Phone: (306) 966-1298


Canadian Light Source Education Team


Phone: (306) 657-3525


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© Copyright Canadian Light Source Inc 2021. All Rights Reserved.

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