素质教育是以学生为主体的教育。从这个意义出发，教师在备课和课堂教学时都要处处站在学生的角度来钻研教材，设计教案，组织教学，指导练习。要尽量创造条件，让每个学生都有充分表现自己的机会，从而引导学生积极主动地动手、动脑、动口，让全体学生都能自始至终主动积... Quality education is a student-centered education. From this point of view, teachers in the preparation and classroom teaching should always stand in the perspective of students to study textbooks, design lesson plans, organize teaching and guide the practice. To try to create the conditions for each student to have their own opportunities to fully demonstrate, so as to guide the students to be pro-active, brains, move mouth, so that all students can take the initiative to plot ...