Marge Scherer describes this issue of "Educational Leadership" as being all about questioning for learning--how to ask questions of students, how to encourage students to ask their own questions, and how to ask better questions and find better answers. Among feature topics explored in this issue are why children, who start questioning almost as soon as they learn to talk, ask far fewer questions when they get to school. In "What Children Learn from Questioning," Paul Harris describes the findings of research analyses of extensive transcripts of children's natural speech. Harris concludes that if teachers become more aware of questioning patterns in their classrooms, they would be able to create conditions that encouraged more student questions. Authors in this issue also discuss how feasible it is to encourage questioning in the age of standards and pacing guides, as well as how often adults should answer questions as opposed to guiding students to find the answers on their own. "Who's Asking" (Alfie Kohn) states that students' questions should be the primary driver of their learning, and that teachers should model and encourage a skeptical disposition. Other articles, from Susan Brookhart in "Making the Most of Multiple Choice" to Dylan Wiliam in "Designing Great Hinge Questions" to Cris Tovani in "Let's Switch Questioning Around" point out how teachers can use a blend of teacher and student questions to understand how students think, as well as to help them think more clearly. Grant Wiggins and Denise Wilbur in "How to Make Your Questions Essential" follow up on the exploration of essential questions, suggesting seven ways to question your questions. These include identifying the hard-to-understand but vital connections of ideas; posing a question more generally about concepts such as friendship, war, ecosystems, and so on; and familiarizing yourself with the most commonly misunderstood aspects of the subjects you teach and building your questions around them. Getting the questions right takes discipline, skill, and artfulness, but it's well worth the effort to ensure that students tackle important, intriguing, and revealing questions--the kind that will help humankind survive and thrive.