在课堂教学中,教学的成效与练习因素有很大的关联,练习可以提高教学质量,但练习也可能加重学生负担。在日常的教学中,不难发现:同样的练习,由于呈现和处理的方式不同,有的班级费时费力却效果不佳,有的班级兴趣盎然且收获甚丰。应该说集体备课后的练习设计,汇集了平行班教师的集体智慧,手执同样的练习设计,为什么教学的效果大相径 In classroom teaching, the effectiveness of teaching and practice factors have a great relationship, practice can improve the quality of teaching, but practice may also increase the burden on students. In everyday teaching, it is not difficult to find that the same exercises are time-consuming and ineffective due to the different presentation and handling methods, and some classes are very interested and rewarding. It should be said that the practice of collective post-lesson design, brings together the collective wisdom of teachers in parallel classes, hand-held the same practice design, why the effect of teaching a large difference