课堂教学是实施素质教育的主阵地,教师在其中起着举足轻重的作用。在新课标的引导下,教师的主导作用尤为明显。同时,新课程提倡自主、合作、探究的学习方式,强调以“学生为中心”。学案的使用,就是为了突出“以学生为中心”。课堂教学中,教师在自主学习、知识讲解、课堂把控、学习评价等方面都应该发挥主导作用。 Classroom teaching is the main front for implementing quality education, in which teachers play a decisive role. Under the guidance of the new curriculum standards, the leading role of teachers is particularly evident. At the same time, the new curriculum promotes independent, cooperative and exploratory learning styles, emphasizing “student-centeredness.” The use of the case is to highlight “student-centered ”. In classroom teaching, teachers should play a leading role in autonomous learning, knowledge explanation, classroom control, learning evaluation and so on.