课堂教学是一种有目的、讲效率的教育教学行为,教学要求学生能够理解并掌握课本知识,在学习的过程中学会运用相应的知识解决问题的能力,从而努力提高自己的智力水平。因此,课堂教学的有效性就成为教学的关键,学生应该学会必要的知识和技 Classroom teaching is a kind of purposeful and effective teaching and learning behavior. The teaching requires students to understand and master the knowledge of textbooks and learn to use the corresponding knowledge to solve problems in their learning so as to improve their intelligence level. Therefore, the effectiveness of classroom teaching has become the key to teaching, students should learn the necessary knowledge and skills