Research indicates that interdisciplinary instructional strategies help students make meaningful connections among various subjects through asking questions, making predictions, and thinking critically (Borich 2000). For this purpose, trees are an easily accessible and cost effective resource. Additionally, learning about the forest teaches students to become stewards of the Earth so future generations can enjoy its many benefits. Therefore, this cross-curricular series of inquiry-based lessons was designed to help students examine meaningful relationships among the growth, physiology, and utilization of trees.