I'm in the same boat...sucks.
You can definitely get PS to the 12-13 range by covering all your weak chem and physics topics. It's hard to identify which ones are weaker, so I personally went back and reviewed EVERYTHING in detail. If you have a lonnnggg time to study, I would suggest buying the BR physics and chem books and do all of the passages. Raised my PS score from ~9 to 12-13. Taking my real test on Saturday and I am more confident on the PS than ever. My last AAMC test was #9, which I took yesterday, and I scored a 14 on the PS.
For BS, TWO THINGS that will for sure raise your scores:
1) STUDY YOUR OCHEM. Use BR for this, too. It may seem tons of work to go through all the passages of all 8 of their chapters, but it will definitely prevent you from missing any ochem questions. It will for sure consistently raise your score at least 1 point on every test.
2) For the bio passages themselves, you need to realize 75% of the answers come straight from the passage. You need to let go of your upper-level bio knowledge and only stick with intro bio levels. For the 25% of bio that is not in the passages, you should read through EK bio. EK provides a very concise, brief review of all the bio you need to know. I have taken numerous, numerous, numerous practice tests and I can guarantee any knowledge not in the passages has been in the EK bio book. It takes less than a week to go through. It's totally worth it. This will raise your score another point or so consistently on every test. That's up from a 10 to a 12. The main thing is using the passage knowledge as much as possible. You just need to work on going slow and trusting the passage. I finally let go of my pride thinking I knew sooo much bio from my bio major and simply answer questions based on the info given to me in the passages and the brief info from EK. THAT'S IT. I was averaging 9-10, I'm consistently at 12 now.
Do what I say and you'll get a score in the mid-30s, at least for sure on AAMC practice tests haha. I'm taking my real test this Saturday, so I'll let you know how that goes. AAMC tests are very indicative of your real score, though, so I'm definitely expecting no less than mid-30s.
Oh and for VR, IDK what to tell you. I also get 10s all the time. Only advice I can give you here is to make sure you are reading question stems correctly. VR scores fluctuate easily because your performance is so specific to the passages you come across. One passage may confuse the hell out of you and finish you off. It's unpredictable. Every time I think I have a VR strategy down that will result in fewer mistakes, a few tests later I miss just as many as before for no apparent reason lol. IDK. Those science scores, especially the PS, are the easiest to raise.
Good luck!
