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July 7, 2010 / pvcamatrix


Welcome to T.R.E.E. Online, an environmental education resource created by the Penns Valley Conservation Association.*

Having trouble reaching environment and ecology standards in class? Looking for some ready-made activities to help teach students about watersheds, wetlands adaptations, animal adaptations, soil, and much more? You’ve come to the right place!

The activities hosted on this website are separated by grade, the links to which you can find at the top of this page. Next, search for activities by standard, location, season, or other key words. Each activity is written in an easy-to-use standardized format. Be sure to see the handouts section for each activity to find helpful videos, pictures, and worksheets. Check out the comments below each page to see what other educators experienced while using these activities in their classroom.

If you have any questions or comments please contact us at

*Financial support for this project was provided by NOAA.