In 2023 the two AP Tests with the most students scoring the lowest were Human Geography (31.6%) and US History (29.8%). In 2022 the two subjects with the most low performers were Economics Macro (33.1%) and Human Geography (31.8%).

2021: https://reports.collegeboard.org/media/pdf/2021-ap-student-score-distributions_1.pdf

2022:https://apcentral.collegeboard.org/media/pdf/ap-score-distributions-by-subject-2022.pdf

2023: https://apcentral.collegeboard.org/media/pdf/ap-score-distributions-by-subject-2023.pdf