Abstract: Classroom questioning is the teaching of all subjects available whenever and wherever a kind of teaching method, the concept is the basic unit of the subject knowledge, through the way of classroom questioning in the teaching of the key information, help students to extract concepts to confuse the concept of comparative analysis, combing the concept, construction of concept map, etc., to help students better grasp the concept.

Key words: Extract, The key information, Easy to confuse, Compare, Build