The term “postie” is short for post-mortem, which in this context refers to the critical process of analyzing your work after completing a test or practice session. The term is used deliberately to emphasize an essential point: if you don’t thoroughly review your practice work after it’s done, you’re effectively wasting the time you spent doing it.
This exercise begins with completing practice sections—or even full practice tests—under conditions of your choice. You may choose to work with or without time limits early on, depending on your comfort level. (Eventually, timed conditions will be important, but it may not be necessary at the start.)
However, it’s important to avoid jumping into full practice sections before you’ve gained a solid understanding of how SAT questions are structured and the patterns they follow. Otherwise, the experience may lead to frustration and confusion, especially when you miss questions without understanding why.
Just as importantly, you should never complete a practice test or section without following it up with a thorough review—a post-mortem. This means going through every question, identifying why it was written the way it was, analyzing what led you to the correct or incorrect answer, and extracting general principles that you can apply to future questions. This step is absolutely essential for meaningful improvement, yet it is often neglected or rushed through by students.
Remember: the ultimate purpose of any practice session is to prepare you for success on test day. The most valuable takeaway from any practice question is not the answer itself, but what the question teaches you about how to approach similar items in the future. In fact, it is far better to miss a question and learn from it than to answer it correctly by chance and learn nothing at all.
If you don’t take the time to reflect on the questions you struggled with, you are likely to repeat the same types of errors—even if the future questions don’t look similar on the surface. The underlying concepts will remain the same, and so will the mistakes, unless you actively work to correct them.
So, take your post-practice analysis seriously. A well-done post-mortem not only accelerates your learning but can also dramatically reduce the total number of practice tests you need to take—saving you time, energy, and frustration in the long run.