Math Reminders build math memory because the student is looking up the answers. Just as we used to know everyone’s phone number because we dialed it and looked it up many times, the same is true for looking up math processes.
Yes, it is an excellent source to review for any standardize test.
As soon as a student starts working with decimals and fractions it will be helpful, usually around 4th or 5th grade. Math is a cumulative subject; therefore Math Reminders will be helpful through college and beyond. Many parents use them to help their children with homework.