Average grade anomalies and gendered performance differences for all of the 116 large U-M courses in our data set are shown in Figure 3. Each is labeled as belonging to Science and Engineering, the Social Sciences, or the Humanities. In general, STEM courses impose the largest grade penalties on students. These are often accompanied by significant gendered performance differences. Courses in the Social Sciences span a broad range of grade anomalies, and generally exhibit small gendered performance differences. Humanities courses typically award modest grade bonuses, and like Social Science courses, exhibit small gendered performance differences. Details for each course are contained in Table 1 in the supporting information [14].