This document describes an ecosystem lesson plan for students. It defines an ecosystem as a system formed by living things interacting with their physical environment. The lesson introduces students to the components of an ecosystem - climate, vegetation, and animal life - and how they work together. It then focuses on the local temperate deciduous forest ecosystem. Students are divided into groups to make a puzzle about the climate, vegetation, and animal life of the forest ecosystem using images from magazines. Finally, the document discusses extending the lesson by having students research other ecosystems in groups.