Using rich administrative data from a small Dutch liberal arts college, I study how the number of students enrolled in a course affects student grades and course evaluations. Exploiting variation across parallel sections of the same course taught by the same instructor, I show that class size has a significant negative effect on student grades in mandatory courses, but not in electives. I show similar results for various components of student course evaluations: perceived overall course quality, perceived amount learned, student participation and engagement. I interpret these findings to be consistent with class size affecting educational outcomes through student engagement.

中文翻译：

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班级规模对成绩和课程评估的影响：来自多部分课程的证据

使用来自荷兰一所小型文理学院的丰富管理数据，我研究了参加课程的学生人数如何影响学生成绩和课程评估。利用由同一位教师教授的同一门课程的平行部分的差异，我表明班级规模对必修课程的学生成绩有显着的负面影响，但对选修课没有影响。我对学生课程评估的各个组成部分展示了类似的结果：感知的整体课程质量、感知的学习量、学生的参与度和参与度。我将这些发现解释为与通过学生参与影响教育成果的班级规模一致。