This document discusses essential questions, Bloom's taxonomy, understanding by design, and depth of knowledge (DOK) levels as they relate to curriculum planning and assessment. It provides information on framing essential questions to engage students in higher-order thinking. It also explains the three stages of understanding by design: identifying desired results, determining acceptable evidence of learning, and planning instructional experiences. Finally, it outlines the four DOK levels and provides sample question stems for each level to assess different types of cognitive demand.