I’ve encountered many brilliant students in college, with straight A’s through highschool and stellar SATs, who cannot string three or four sentences together into a coherent paragraph. I am now trying to realize a vision of a Khan-inspired service for writers who are not getting the help they need from school. This is probably not the time for a shameless plug, because my site, as a site, still sucks, but if any student here wants free, quality reviews of their writing projects, you can get them at http://www.essayjudge.com
I say “free,” and mean it, but if you want to abuse the service, then I may ask you for a return favor in the form of development advice.
At present, you can submit writing quickly at the site using anon/anon as uid/pwd, but for HNers who don’t want their writing and the attendant review published, you can google-email me (bbquigley). No promises if I’m inundated, except to try my best.