::Worm has an uncanny knack of very successfully mentoring users for various tasks. NPP and counter-vandalism are both totally essential departments, but their work is different and does not really overlap.  CV has the aid of some 3rd party software, but NPP must rely wholly on  people being able to read new articles thoroughly, and do a lot of manual background checks before passing or tagging new articles. The CVU has started an academy, which  although I feel it is excessively bureaucratic, might be something to watch by  very experienced users such as Worm, who may be able to come up with some solutions for a possible NPP 'school'. For the time being, we have WP:NPP which Scottywong and I knocked into better shape as a tutorial a couple of years ago, but the problem is in getting people to read it! Handing out gongs and bling and pretty userboxen probably won't work because in general, there is no way to obtain a score, which is the way it should really be. I think  probably the way to improving the standard of NPP  is simply to step up  what a few admins are already doing, and come down a tad harder on those who in spite of requests still don't get it right, and insist they go through some mentoring  process before they are allowed to tag another page.