This document discusses two instructional design models: ADDIE and ASSURE. ADDIE is a five-phase model (Analysis, Design, Development, Implementation, Evaluation) that provides a structured process for designing instruction. ASSURE is a simpler six-step model focused on media-based instruction. Both models aim to create effective learning experiences, though ADDIE takes a more systematic approach while ASSURE emphasizes learner-centered evaluation. The document compares the models' histories, strengths, and weaknesses.