In this report, the authors examine the impact of scoring a 1 or 2 on an AP® Exam in 10th grade on later AP Exam participation and performance. As access to AP courses increases within and across schools, a growing number of students are taking AP courses and exams in the earlier grades of high school. Using a matched sample of AP and no-AP students, this study explored the following research questions for seven AP Exams: (1) Are students who receive a 1 or 2 on an AP Exam in the 10th grade more likely to take an exam in subsequent grades than students who did not take any exams in 9th or 10th grade?; and (2) Are these students more likely to pass a later exam than students who did not take any exams in the 9th or 10th grade? Results showed that regardless of AP Exam subject, 10th-graders who scored a 1 or 2 were significantly more likely to take an AP Exam later in high school than comparable students who did not take an early AP Exam. However, the seven exams yielded different results in the likelihood of students scoring 3 or higher on an AP Exam in the 11th or 12th grade. Tables with statistical data are appended.