There are two important considerations when scheduling practice tests. The first is burnout. Twice a week leading into once a week closer to the test is good spacing because it keeps burnout to a minimum. How many you take will depend on your scores. What is your goal and how close are you to it? This is a question you must answer before you can tell how many tests you need. That being said, more tests = more experience so if you have the time and resources, more is good. Also keep in mind that just taking the practice test will not necessarily bring your score up. It's effective analysis that does. Know why each right answer is right and each wrong answer is wrong. Get a deep understanding of the critical thinking strategies required. If you are missing out on analysis time, you've scheduled too many tests.
