The American Association of School Librarians (AASL) Standards for the 21st-Century Learner mandate that students are equipped with the skills they need to pursue lifelong learning. The Common Core State Standards, Next Generation Science Standards, and C3 Framework for Social Studies Standards all advocate for genuine student inquiry, and the best thinkers in education are demanding that students take a more active role in their education to make them competitive in the global economy. One practice that can prepare students for a lifetime of engaged learning is asking questions. In this article, the authors discuss what makes questioning a literacy, how questioning and critical thinking are related, and how questioning is fostered in students.