There are many questions to be asked about the pedagogical practice of questioning. Questions provide insight into what students at any age or grade level already know about a topic, which provides a beginning point for teaching. Questions reveal misconceptions and misunderstandings that must be addressed for teachers to move student thinking forward. In a classroom discussion or debate, questions can influence behaviors, attitudes, and appreciations. They can be used to curb talkative students or draw reserved students into the discussion, to move ideas from the abstract to the concrete, to acknowledge good points made previously, or to elicit a summary or provide closure. Questions challenge students' thinking, which leads them to insights and discoveries of their own. Most important, questions are a key tool in assessing student learning. When practiced artfully, questioning can play a central role in the development of students' intellectual abilities; questions can guide thinking as well as test for it.

Although many teachers carefully plan test questions used as final assessments of students' degree of experience with the course material, much less time is invested in oral questions that are interwoven in our teaching. Analysis of the kinds of questions we ask, whether they are oral or written, and the nature of the answers they elicit is even rarer. Given the important role of questions in teaching and learning, a method for collecting evidence about our own questioning strategies and a framework within which to analyze them has the potential to transform our teaching. Such a framework can be found in Bloom's (1956) Taxonomy of the Cognitive Domain, a classification system for cognitive abilities and educational objectives developed by educational psychologist Benjamin Bloom and colleagues. This article discusses how teachers can use Bloom's Taxonomy to guide construction of questions in class discussions to encourage higher-order thinking in students.