The PSAT/NMSQT includes Reading and Writing and Math. This test can be used to track progress but is also used to determine eligibility and qualification for the National Merit Scholar Program. This test is offered digitally.
The SAT is a college entrance exam used by colleges and universities to make admissions decisions. It is multiple choice and offered digitally. It covers Math and Reading and Writing.
The ACT is a multiple choice test used to assess college readiness. It is used by colleges to help determine admissions. It includes English, Mathematics, Reading, and Science with an optional Writing portion.