叶圣陶先生说过“:教材只能作为教课的依据,要教得好,使学生受益,还得靠老师的善于运用。”由此可见,教师作为学生学习的指导者,应该在深入钻研课程标准、教材和学生的过程中,正确理解教材编写的意图,从实际出发,对教材进行适度的开发,以提高课堂教学的实效性。教材中的例习题为师生教与学活动提供了大量有 Mr. Ye Shengtao said “: teaching materials can only be used as the basis for teaching, to teach well, to benefit students, but also by the teacher’s good use.” Thus, the teacher as a student learning mentor, should be in-depth Studying the curriculum standards, teaching materials and students in the process, the correct understanding of the intent of teaching materials, from the reality, the proper development of teaching materials to improve the effectiveness of classroom teaching. Exercises in the textbook for teachers and students to teach and learn activities provide a lot of