新课标提倡“以学生为本”的学生观,要真正落实这一观点,有效地提高生物课堂教学的实效性,就要求教师在导课过程中精心设计、巧妙创设,就如奏响了课堂教学主题曲的前奏,既可以调节学生的心理环境,激发学生的学习热情,又能为课堂教学的展开增添趣味性、生动性,从而提高生物课堂的教学效率。 The new curriculum advocate “student-oriented ” view of the students, to truly implement this view, effectively improve the effectiveness of biological classroom teaching, requires teachers in the course of careful design, clever creation, just as playing It raises the prelude to the theme song of classroom teaching, which not only can adjust students ’psychological environment, stimulate students’ enthusiasm for learning, but also increase the interest and vividness of classroom teaching so as to improve the teaching efficiency of biology class.