This document provides a rubric to evaluate the quality of lesson design based on Understanding by Design (UDB) standards. It assesses lessons across three stages: 1) identifying desired results to determine if the targeted understandings are enduring concepts and framed as generalizations; 2) determining acceptable evidence to ensure assessments validly measure understanding through authentic tasks; and 3) planning learning experiences to engage students through essential questions and provide feedback and self-evaluation. The rubric rates quality at three levels - exemplary design, satisfactory design, and design needs improvement - to guide educators in creating lessons focused on big ideas and high-quality student understanding.