Lorensen, Lana. 2007. This lesson incorporates objectives from the unit entitled Life Science: Sustainability of Ecosystems in the Science 10 Curriculum Guide. It can be taught as an introduction to the unit or as a review and closure. The lesson uses the children’s book Dear Children of the Earth: A Letter from Home by Schim Schimmel as its central point, but teachers could substitute books from their own libraries with similar themes. 18 p.