This memorandum provides information related to Advanced Placement (AP) and International Baccalaureate (IB) course enrollment, exam participation, and exam performance during the 2020-2021 school year in Montgomery County Public Schools (MCPS). In this memo, the results of 2021 students were compared with those of 2019 students. It is important to note that 2019 students had in-person schooling but 2021 students experienced virtual learning. Additionally, 2021 students were allowed to reduce their course load due to challenges of learning during the pandemic. It is prudent to recognize the differences of 2019 and 2021 student cohorts when a comparison of the data is made. The College Board shifted their testing procedures in the 2019-2020 due to the COVID-19 pandemic, and they continued in the 2020-2021 school year. The number of AP exams taken by high school students was 31,750 in 2021, a decrease of 9,298 tests from 2019. The percent of AP exams taken by students with a score of 3 or higher was 68.1 in 2021, a 3.4 percentage-point decrease from 2019. MCPS students decreased participation in the number of IB exams from 3,587 in 2019 to 3,084 in 2021. [For the 2019 report, see ED627127.]