课本习题是经过反复琢磨、认真筛选后精心设置的,具有一定的典型性、示范性、探究性,它在日常教学和高考复习中的重要性早为人知.那么怎样才能用好呢?一是探索多解,把其改编成新题;二是适度延伸,对其推广并运用.今举一例,谈谈在复习不等式证明的教学中,引导学生钻研课本.探究习题、拓展学生思维、提高学生探究能力和应变能力的做法. Textbook exercises are meticulously set after repeated consideration and careful screening. They are typical, exemplary, and exploratory. Their importance in daily teaching and reviewing in the college entrance examination has long been known. So how can we use them well? Explore multiple solutions and reorganize them into new ones. Second, extend them moderately to promote and apply them. This is a case study. In the teaching of reviewing inequality proofs, students are encouraged to delve into textbooks. Explore exercises, expand student thinking, and improve students. Exploring abilities and resilience practices.