FSPC-A - Future Sailor Prep Course - Academic

Hi there!  Just wondering if anyone's kiddo has gone through the Future Sailor Prep Course - Academic prior to bootcamp. Son's recruiter didn't have much information other than it's a three week long course to help the sailor score higher on the ASVAB. In research I found he starts the class after P-days but have heard from other recruiters it may not last three weeks. Just trying to get accurate information LOL. Thanks in advance.