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试卷讲评课的五字真经:诊、筛、让、炼、追,真正把考试变成提分杠杆

  • 2026-04-14 23:51:55
试卷讲评课的五字真经:诊、筛、让、炼、追,真正把考试变成提分杠杆

考试是在教学过程中花费最多的一次信息收集活动。命题、印刷试卷、监考、评卷,整个过程所花费的时间和精力差不多相当于准备一星期的课程。那么这套程序的输出是什么呢?不是分数,也不是排名,而是一份非常准确的“学情诊断报告”,每一道错题都会告诉你,在该知识要点上,学生的思维过程在哪个环节出现了问题。

该报告的价值要大于所有的辅导书。教辅是面向“所有的学生”的,而这份报告是面向“我们班上的四十多个具体的学生” 的。可以准确的反映出每个人、每道题以及每次错误的操作。十分恰当的教学依据。

但是大多数教师拿到这个报告之后又会怎么做呢?

读答案部分。

把第一个问题读到最后一题。正确的跳过,错误的讲一遍,时间不够就加快速度,语速越来越快,学生越听越木。一节课结束之后,老师感觉“应该讲的内容都已经讲完了”,学生也认为“应该听的内容都已经听了”,双方都可以心安理得。下一次考试时,同样的题型换上不同的数字,仍然会有同一个人出错。

这并不是在对课进行评价。是对于情报资源的一种浪费。

一场考试就好比做一次全面体检,每一题做错的地方就是出现的异常情况。讲评课就是拿着体检报告进行精确治疗。假如医生拿到化验单后,从头到尾一字不落地把所有指标都读一遍,然后对病人说,“你回去注意一下”,那么任何一个病人都不会认为这是看病。但是我们许多老师的评课,就是在做这样的事情。

真正的高质量试卷评讲课,要做的是“过一遍答案”吗?不是的,而要完成以下五个任务:诊断病因、确定目标、启发思路、总结模式、检验效果。可以总结成五个字,诊、筛、让、炼、追。这五个词之间并不是并列的关系,而是严密的因果关系:如果诊断不准,就无法筛选出重点,没有重点的课堂就会缺少中心,学生的思想无法打开,思想无法打开,老师也就无法提炼,提炼不出来的话,课后也就不能跟踪了。任何一个环节出现故障,讲评课就会变成“念答案”。

逐一进行分解。

第一个字是诊

讲评课质量的好坏主要由两方面决定,其中70%是由课前准备工作决定的,另外30%则由课堂上的表现来决定。课前准备的核心就是一个字,诊。

老师们批改好试卷之后第一件事就是“赶快讲”,生怕拖延时间太长,学生们会忘记。心情是可以理解的,但是越是着急就越不能有冲上去讲课的想法。改完试卷之后到上课讲评之前,要有一个数据诊断的过程。

那么怎么来判断呢?分三步进行。

第一种方法就是计算出每道题全班错误率。不需要精确到小数点,分成三个等级:错误率在40%以上标红,为全班性的塌方;错误率在15%~40%之间标黄,为局部薄弱;错误率低于15%的不标色,属于个别的。很多老师认为这一步很麻烦,其实批阅试卷时顺手在旁边画一个“正”字就可以了,并不会花费五分钟左右的时间。但是这五分钟就决定着后面的四十分钟课堂有没有目标。

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  1. CONNECT:[ UseTime:0.001107s ] mysql:host=127.0.0.1;port=3306;dbname=www_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001826s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000767s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000748s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001640s ]
  6. SELECT * FROM `set` [ RunTime:0.000658s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001916s ]
  8. SELECT * FROM `article` WHERE `id` = 474616 LIMIT 1 [ RunTime:0.001602s ]
  9. UPDATE `article` SET `lasttime` = 1776376932 WHERE `id` = 474616 [ RunTime:0.018685s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000698s ]
  11. SELECT * FROM `article` WHERE `id` < 474616 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001299s ]
  12. SELECT * FROM `article` WHERE `id` > 474616 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001135s ]
  13. SELECT * FROM `article` WHERE `id` < 474616 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.003391s ]
  14. SELECT * FROM `article` WHERE `id` < 474616 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001185s ]
  15. SELECT * FROM `article` WHERE `id` < 474616 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.006052s ]
0.122413s