This is a practice test, so the only preparation I would do is to take a sample test once or twice at the dining room table. You can find them in Kaplan PSAT books at the library, and your school probably has them, too. (My son found an error in his Kaplan SAT prep test last year, so if your son gets an answer wrong, check the explanation which might be different than the answer key. Ugh.)
DS15 did great on the ACT (3 times, no writing) so I was surprised his SAT (through NUMATS) was not nearly as good; in fact, middle of the road. I asked about that here, and the answers were that it's a vey different kind of test from the ACT.
Actually, a good result on the PSAT sets you up for national merit scholar and merit-based financial aid in college. It may be intended to be a practice test, but the possibility if the merit scholar thing means I wouldn't hesitate to prep for it. (and I'm super anti-testing)
The student's responses to items on the PSAT/NMSQT answer sheet that are specific to NMSC program entry determine whether the individual meets requirements to participate in the National Merit Scholarship Program. Click here to see NMSC program entry items on the PSAT/NMSQT answer sheet. Score reports provided for test takers and their schools indicate whether the student meets program entry requirements. A school official or the student should report immediately to NMSC any error or change in reported information that may affect participation. back to top
Program Recognition
Of the 1.5 million entrants, some 50,000 with the highest PSAT/NMSQT® Selection Index scores (critical reading + mathematics + writing skills scores) qualify for recognition in the National Merit® Scholarship Program. In September, these high scorers are notified through their schools that they have qualified as either a Commended Student or Semifinalist.