This document discusses the importance and art of questioning in the learning process. It provides information on different types of questions, including lower-order and higher-order questions. Higher-order questions that promote critical thinking are most effective. The document also outlines purposes and principles of questioning, levels of questioning based on Bloom's Taxonomy, types of questions teachers can ask, and strategies for effective questioning. The overall message is that questioning is a key tool for teachers to engage students, check understanding, and stimulate critical thinking.