I glanced at your profile, and it said you are preparing for the ASVAB. You do not need to take that test to be an officer, the one you want is the ASTB (Aviation Selection Test Battery). There is an enormous amount of information on the ASTB on this site and an entire forum devoted to the test. You will not need to take the whole test, however, unless you decide to go into aviation. Other designators will take the math, reading, and mechanical comprehension sections only, and not the aviation sections. Again, there's a lot more info on the test on these forums and the web at large for me to really go deeper than that. Otherwise, I don't know much about PAO, but I heard it's very competitive and they like to select from the fleet - again - not verified info. If you haven't contacted an Officer Recruiter yet, that should be your first move. Good luck to you, and it's good to see a fellow substitute teacher!