课堂教学中的问与答是师生交流的主要形式,也是教师获得教学反馈的有效手段之一,对于构建有效课堂、引导学生参与探究活动有着重要的作用。适时、适当、适度地对学生的问答进行评价,则是对学生参与活动的一种总结与评判,有助于激发学生的求知欲望,调动学生探索的积极性,建立和谐互信的师生关系。然而,在日常教学活动中,一些教师对学生答问的评价流于形式,为评价而评价,不能促进学生发展和教师专业成长,也很难发挥评价对课堂教学的促进作用。实践证明,对学生的答问作出恰当的评价是一门学问,也是 Q & A in classroom teaching is the main form of teacher-student communication and also an effective means for teachers to obtain teaching feedback. It plays an important role in constructing effective classroom and guiding students to participate in inquiry activities. Appropriate and appropriate evaluation of the students 'questions and answers in a timely, appropriate and appropriate manner is a summary and judgment of the students' participation in activities. It helps stimulate students 'curiosity and desire, arouse students' enthusiasm for exploration and establish a harmonious relationship between teachers and students. However, during the daily teaching activities, some teachers evaluate the students' questions and answers in the form of evaluation, which can not promote the development of students and the professional development of teachers. It is also difficult to give play to the role of evaluation in promoting classroom teaching. Practice has proved that it is a knowledge and correct answer to students' question and answer