Looking at Northwetsern's NUMATS site....

PSAT 8/9

NUMATS utilizes the PSAT 8/9 test, developed by College Board for students in grades 8 and 9, to determine the abilities of students in grades 3 through 6. PSAT 8/9 includes a Reading Test, a Writing and Language Test and a Math Test. Registered students arrive to assigned test center at 8:00 a.m. The test takes 3–3½ hours to complete. A non-Saturday test date is available for all students. Those who request this test date for religious reasons and submit a letter from clergy will qualify for priority seating.


I wonder if Davidson is going to change the requirement from the Explore to PSAT 8/9 since the Explore test is no longer available...