在一节“二次函数的图像和性质”复习课上,教师先是通过提问的方式让学生回答前一天布置的课外练习题的答案,然后只对学生回答错误或不会做的题目进行讲解.那么,学生“会”做的题目,教师真的就不用讲了吗?下面仅选择其中一道选择题和一道填空题来说明学生“会”做的某些题目,教师适当的讲解还是有必要的.实例1(选择题):已知函数y=(k-3)x~2+2x+1的 In a review of the Image and Nature of Quadratic Functions section, teachers first ask students questions by answering the answers to the extra-curricular exercises the day before, and then only answering questions that the student is wrong or not doing So, the students “will ” do the title, the teacher really do not have to say? Here is to select only one of the multiple choice questions and a blank fill question to illustrate the students “will ” to do some of the topics, teachers appropriate Example 1 (multiple-choice questions): Known function y = (k-3) x ~ 2 + 2x + 1