www.ascd.org/publications/books/109004/chapters/What-Makes-a-Question-Essential%A2.aspx

This book chapter explains how teaching with essential questions can challenge students to think deeply about big ideas that are core to the disciplines and captivate their interest by making learning meaningful. This informative introduction assists teachers in crafting questions to guide inquiry and learning that help students make connections among ideas and understand the relevance, value, and depth of topics being studied.