The document discusses how to write effective essential questions. It defines essential questions as open-ended questions that require students to think critically and develop original answers through research and evaluation. Essential questions are found at the higher levels of Bloom's Taxonomy and Webb's Depth of Knowledge model, requiring analysis, synthesis and strategic thinking. The document provides examples of different types of essential questions that begin with words like "how", "what if", "should", and "why". It also distinguishes essential questions from traditional fact-based questions and provides guidance on writing open-ended essential questions focused on a particular unit or lesson.