Star Math is a customized math test for students to take on a computer. The test is designed for students in grades 1 through 12 (also for students in kindergarten who have basic reading and math skills; students must be assigned to a grade from K–12 in order to see Star Math when they log in). This computer-adaptive test chooses each question from a large pool of test items, making subsequent questions more or less difficult than the prior question depending on whether the student answered the prior question correctly. The pool of test items is large, and the software tracks which questions a student has already seen, so a specific question will not be repeated for a student within a 120-day window.

Teachers can use Math Reports to determine the math level of each student and to measure growth. Students can finish a Star Math test in about 20 minutes.