This document outlines the key parts of an interactive lecture presentation on diagnosing the fundamental constituents of an essay. It includes objectives to classify the parts of an essay, identify the components of compositional writing, and analyze arguments. The main body explains each part of an essay like the introduction, thesis, topic sentence, evidence, and conclusion. It provides examples for each part and has students discuss and apply their understanding. The goal is to help students enhance their writing skills by understanding essay structure.