This document outlines a unit plan for an 8th grade mathematics class centered around measuring trees. The unit consists of 5 lessons applying geometric concepts like circles, similarity, the Pythagorean theorem, functions, cylinders, and cones to measure properties of trees. In each lesson, students will learn key formulas through lecture and assignments then apply them by measuring aspects of a tree they selected for a long-term project, gaining experience with geometric applications in a real-world context.