This study reports that student performance on the PSAT/NMSQT can be useful in identifying additional students who may be successful in Advanced Placement Program (AP) courses. PSAT/NMSQT scores can identify students who may not have been initially considered for an AP course through teacher nomination, self-nomination, or other local procedures. Performance on the PSAT/NMSQT is not strongly related to AP grades on four examinations: (1) studio art: design, (2) studio art: drawing, (3) German language, and (4) Spanish language. The relationship of PSAT/NMSQT scores with other AP Examination grades is moderately strong and invariant across ethnic groups and time of testing. That is, the relationship is substantially the same for all ethnic and racial groups and is only slightly weaker when time between testing spreads across two academic years. Tables are appended.