This memorandum describes the Advanced Placement (AP) and International Baccalaureate (IB) exams participation and performance of 2013 to 2015 public school graduates in Montgomery County Public Schools (MCPS) and the state of Maryland. The results are disaggregated by demographics and high schools. Students in the MCPS Class of 2015 continued to demonstrate strong performance on AP examinations based on AP results released by the Maryland State Department of Education and the College Board. In 2015, 65.7 percent of MCPS graduates took one or more AP exams. From 2014 to 2015, the AP exam participation rate decreased 1 percentage point for MCPS graduates. More than one half of the 2015 MCPS graduates earned at least one AP exam score of 3 or higher (51.1 percent). The rate of earning a 3 or higher on at least one AP exam remained steady for 2015 MCPS graduates (51.1 percent) as opposed to students in the Class of 2014 (51.5 percent). In addition to AP programs, MCPS also provides the IB program for students at selected high schools as an option for experiencing college-level coursework and earning college credits in high school. The IB program continues to grow, and MCPS high school students demonstrate a steady increase in IB course and exam participation. In 2015, the percentage of MCPS graduates who took one or more IB exams (7.8 percent) remained steady compared with 2013 MCPS graduates. The stable participation of graduates in IB exams also was reflected in the proportion of graduates who earned at least one IB exam score of 4 or higher--6.4 percent in 2013 and 2015. A similar trend was observed with regard to IB exam participation and performance for all racial/ethnic groups except for Black or African American graduates. Between 2013 and 2015, Black or African American graduates demonstrated a notable increase in the rate of taking at least one IB exam. Concurrently, Black or African American graduates had an increase in the rate of earning an IB score of 4 or higher from 4.4 percent in 2013 to 5.1 percent in 2015. The tables included in this memorandum provide the results of the AP and/or IB exam participation and performance, and the attainment of college readiness scores--at least one AP exam score of 3 or higher or one IB exam score of 4 or higher. [For the 2014 report, see ED557735.]