In 2024 the two AP tests with the most students scoring the lowest grade was Human Geography with 30% getting the lowest score, and second place was Psychology and Physics 1, tied with 27%

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

2024: https://apstudents.collegeboard.org/about-ap-scores/score-distributions