新一轮课程改革很重要的一个方面是改变学生的学习状态,在教学中更加关注学生的学习过程以及情感、态度、价值观、能力等方面的发展.2006年4月,笔者在绍兴市属中学数学优质课评比中听“分式”一课,有一些想法.在课堂教学过程中,教师不仅要解决问题,更要善于发现问题,能捕捉课堂上稍纵即逝的瞬间,及时调整设计思路和方法,使课堂因为瞬间而美丽.1 我所观察到的教材中的一个教学重点和难点:分式中分母的取值不能为零,当分母为零时,分式没有意义;当分子为零,分母不为零时,分式的值为零.从教材设计到上课教师的设计:例1 对于分式 (2x+1)/(3x-5),改为对于分式 (3x-2)/(x-1), One of the most important aspects of the new round of curriculum reform is to change the learning status of students and pay more attention to the development of students’ learning process and their emotions, attitudes, values, abilities, etc. In April 2006, There are some ideas in the course of listening, listening and teaching in mathematics high-quality class.In the process of classroom teaching, teachers should not only solve the problem, but also be good at discovering the problem, catch the transient moment in the classroom and adjust it in time Design ideas and methods to make the classroom beautiful because of the moment.l A teaching emphasis and difficulty in the teaching materials I have observed is that the fractional denominator can not be zero in value and has no meaning when the denominator is zero. The numerator is zero and the fractional value is zero when the denominator is not 0. From teaching design to the design of the class teacher: Example 1 For fraction (2x + 1) / (3x-5), instead of fractional (3x -2) / (x-1),