Do prep schools like Loomis, Deerfield, Exeter Do Math Placement Tests in 9th grade?

Same for kiddo’s school. She had to print out the test, complete it, scan it and return it. I believe she had one hour to do each one (on the honor system). For math, she had to do three separate tests since she had taken algebra 1/2 and geometry. She was placed in the equivalent of honors Algebra 2. Spanish was one test but it was clear there were different sections. She’d taken Spanish since she was 3 and was placed in Spanish 1. Both placements have been perfect for her.