教育研究人员、教育管理人员和教师常常需要对不同年度或不同学科的教学质量进行比较,以便从中总结经验教训,达到不断改善教学工作的目的.到目前为止,考试成绩仍然是衡量教学质量最常用的主要指标.因此,比较不同年度或不同学科的考试成绩,就成了比较不同年度或不同学科教学质量的重要方法. Educational researchers, educational managers and teachers often need to compare the quality of teaching in different years or different disciplines in order to summarize the lessons learned to achieve the purpose of continuous improvement of teaching. So far, the test scores are still the most commonly used to measure the quality of teaching Therefore, comparing exam scores of different years or different disciplines has become an important method for comparing the quality of teaching in different years or different disciplines.