For both the math and multiple choice reading comprehension tests (online tests) a student could start, leave, and even come back and finish a test later. Once a student logs back on, the test will pick up where the student left off.
Math tests usually take about 13-15 minutes per test to complete though the timing of math tests is left up to the teacher. Timing of the test is whatever the teacher decides, it’s just important that the teacher be consistent. For multiple-choice reading comprehension tests, timing of the test is also whatever the teacher decides. It’s about 25-30 minutes for second graders to complete and 30-40 minutes for 3rd-8th graders.
The benchmark tests take the same amount of time to complete as the progress monitoring ones with the exception of the Math Benchmarks. Generally, the Math benchmark measures take 30-45 minutes for students to complete.