You can get the same improvement by reading a test prep book. You need to know the 3-4-5 triangle, this list of word definitions, a handful of other stuff. How

You can get the same improvement by reading a test prep book. You need to know the 3-4-5 triangle, this list of word definitions, a handful of other stuff. How much time you have. Now take a few practice tests, also freely or cheaply available anywhere. All of it should be a review of methods and skills you already have from school. That is the point of the test after all. To me, those test prep places always seemed to be struggling with legitimacy. It's not like hiring a tutor to help you learn difficult concepts for the first time.