新课程的理念不仅重视知识的传授,而且是思维能力的培养及个性品质的形成。这就需要调动学生学习的主动性,发挥学生的主体作用,为学生创设一个宽松的环境,使不同的学生都有所收获,满足不同学生的不同需要。对课本上的例题或课后习题进行变式,对学生解决以上问题会有所帮助。运用变式教学可以明确公式定理的条件,结论和适用 The concept of the new curriculum not only attaches importance to imparting knowledge, but also the cultivation of thinking ability and the formation of personality qualities. This requires mobilizing the initiative of students to learn and play the main role of students to create a relaxed environment for students to benefit different students to meet the different needs of different students. Variants on the textbook examples or after-school exercises, students will help solve these problems. The use of variant teaching can clarify the conditions of the theorem, conclusion and application