What kind of prep do high scorers find helpful for PSAT? Khan academy? One of the books? Something else? DS19 was close to our state’s SI cutoff sophomore year, so he’s just looking to review a bit, to make sure he doesn’t drop. With a busy schedule and plenty of better things to do than test prep 
time efficiency is key here.
Proctored practice tests, Khan Academy, PWN the SAT for math and Erica Meltzer’s SAT critical reading and grammar guide. Very concise, best money spent on PSAT/SAT prep hands down! Also read the blogs of both author’s (free) very helpful!
@3scoutsmom, what would you say is the best bang for time spent? I want to start summer before 10th grade. I can let you know more when I get Aug SAT score.
@BingeWatcher Taking timed practice tests, going back and make sure you why each incorrect answer is incorrect and why the correct answer is the correct one is the single best use of time. If you are starting the summer before 10th grade you should have time to work through those 3 books, take practice test and spend time on Khan before 11th grade.
My Ds both used the SAT prep books from Collegeboard. I agree that taking timed tests is a must.
So did everyone just do regular SAT prep and not bother with anything especially PSAT focused? Is there anything on the PSAT that wouldn’t be on the SAT? (Maybe some more junior math that they don’t bother testing at SAT level?)
D18 used Khan Academy and did practice SAT tests. I scheduled her to take the SAT very close to the PSAT in 11th grade–they were about ten days apart. Study once, take two similar tests. The PSAT seemed easy to D compared to the SAT.
We also scheduled the SAT tests close to the PSAT. I think there might be more geometry on the PSAT. I did have my kids do timed practice PSATs too to get a feel for the timing.
@mathmomvt Our son used a PSAT book - I forget if it was one from the College Board or Barrons. He was one off the CA cutoff as a sophomore and easily made it as junior with that prep. I know he took timed practice tests at home for the SAT and subject tests, but don’t recall if he did that for the PSAT. I think he probably did because we were thinking of NMF prior to the PSAT knowing he was close.
That’s a great idea about scheduling SAT and PSAT at around the same time. DS is upstairs signing up for the October SAT as we speak. Since he doesn’t know where he will be applying, we have no idea whether or not he needs to do the essay, but I suggested that he do it, because otherwise, if he finds out later that he needs it, he’ll have to write the whole SAT over again to do that, and he’s hoping not to have to take it more than once.