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在一次考试中,有这样一道题:用文字叙述直线与平面平行的性质定理并证明该定理.评分标准是:正确叙述定理得2分,写出已知、求证,画出图形得3分,正确写出证明过程得5分,本题满分10分.试卷改完后,对该题进行了统计,统计的结果令笔者大吃一惊:121份试卷中,得0分的竟有63份,此题平均分只有2.61分.这与考前的期望值相差甚远.笔者任教的班级是学校最好的两个班,自认为课堂上的讲解能使多数学生掌握所教内容,改完卷后统计的结果却是这
In a test, there is such a problem: the text describes the linear and plane parallel to the nature of the theorem and prove the theorem.The grading criteria are: Correct description of the theorem obtained 2 points, write known, verify, draw the graphics were 3 points, Correctly write a proof of the process of 5 points, the full question 10. After the test paper is changed, the title of the statistics, the statistics of the results so I was surprised: 121 papers, as many as 63 points 0, the average Only 2.61 points.This is far from the expected value of the exam.I teach the class is the best two classes in the school, that in class to explain the majority of students can master what they teach, change the results of the statistics after the completion of the roll But it is this