Deb Matthews, takes us through the importance of UDL and explores each of the three principles in this final episode that focuses on the principle of multiple means of action and expression. Through an understanding of the uniqueness of trees and our relationships with our environment that highlights the benefits we gain by creating rich, diverse educational ecosystems. Much in the same way our world creates rich, diverse natural ecosystems that Matthews is a professor and the child and youth care practitioner program at Centennial College.