素质教育提倡减轻学生的课业负担,提高学习效率,发展学生的综合能力。中学的生物课教学中更应充分体现素质教育的特点,为达到这一目的,在课堂教学中必须充分发挥教师的指导作用和学生的主体作用。如何发挥学生的主体作用呢?这就要求教师在整个教学活动中充分发掘自身潜能,努力培养并提高学生的综合能力。一、设置问题意境,激发学生的学习兴趣学习兴趣是学生学习的动力源泉,学生对所学内容是否感兴趣是课堂效率高低的前提。因此,教师在授课中,巧妙地设置一些 Quality education to promote students to reduce the burden of homework, improve learning efficiency and develop students’ comprehensive ability. In the teaching of biology in middle school, we should fully reflect the characteristics of quality education. To achieve this goal, we must give full play to teachers ’guiding role and students’ main role in classroom teaching. How to play the main role of students? This requires teachers in the entire teaching activities to fully explore their potential, and strive to develop and improve the overall ability of students. First, set the mood of the problem, to stimulate students’ interest in learning Learning interest is the source of power for students to learn, the students interested in what is learned is the premise of classroom efficiency. Therefore, teachers in teaching, cleverly set up some