优化课堂练习　提高教学效率刘显国课堂练习是课堂教学的延伸和发展，是学生独立运用所学的知识，形成技能技巧的必要途径，也是反馈教学信息，改进教法的桥梁。其模式如下：孟子说：“教亦多术矣。”术，就是讲究方法。课堂练习的设计，贵在优化组合。同样的练习，因组合... Optimize classroom exercises Improve teaching efficiency Liu Xianguo classroom exercises are the extension and development of classroom teaching. They are the necessary way for students to use their knowledge independently to form skills and skills, as well as a bridge to feedback teaching information and improve teaching methods. The pattern is as follows: Mencius said: “Education is also more effective.” Surgery is the method of stress. Classroom exercises are designed to be optimized. The same exercise, because of the combination...