练习是课堂教学的重要组成部分,课堂练习是一种有目的、有指导的教学训练活动,是学生掌握知识、形成技能、养成良好学习习惯的重要手段。练习设计就是根据教学目标、教学内容和学生的实际,精心地选择安排和创造性地设计出有目的、有层次而精炼的练习。优化课堂练习设计可以体现训练的科学性,避免机械重复、题海 Exercises are an important part of classroom teaching. Class exercises are purposeful and instructive teaching and training activities. They are important means for students to master knowledge, form skills and develop good study habits. Practice design is based on teaching objectives, teaching content and the actual students, carefully choose to arrange and creative design purposeful, structured and refined exercises. Optimize classroom practice design can reflect the scientific training, to avoid mechanical duplication, the problem of the sea