现代教育观念认为,教学过程是师生积极互动、共同发展的过程。因此,积极引导学生主动参与教学过程是学好数学的关键,其中课前的引导尤为重要。在学习新课之前,教师应引导学生把心理活 The concept of modern education that the teaching process is a positive interaction between teachers and students, and common development process. Therefore, actively guide students to take the initiative to participate in the teaching process is the key to learning mathematics, of which guidance is particularly important before class. Before studying a new lesson, teachers should guide students to live psychologically