Dendrochronology provides opportunities to relate environmental change to growth patterns of trees and can show students both how scientists investigate the past and how the environment can affect trees. At a small rural high school in the Deep South where forestry is a major industry, twenty five high school students participated in a mixed methods research project to determine if dendrochronology would promote understanding of environmental change. The intervention consisted of a ten day unit that employed a set of learning activities to explore environmental change, climate change, and tree growth and concluded with student-created investigations of various aspects of the relationship of trees to their environment. The Wilcoxon matched-pair signed rank test showed significant growth in student performance (P < .01) and was supported by qualitative evaluation that revealed that the students greatly enjoyed creating their own investigations. These activities can provide a new way to engage students in learning about environmental change of the past and the present.