[Meta Comment]:<p>Posted this because of a recent “Ask HN” from a few days ago asking for any low-cost, high impact start-up ideas for low-skilled tech-workers.<p>When I came across this today I immediately thought - Wow, this is an idea that could exponentially scale - Think graduates/high grade course completer's then being recruited to work for your start-up to be mentors then progressing to graders then up to tutors as a Win-Win – They get their first ‘real job’, Company gets employees loyal to the idea/concept. Career progression built right in to the buisiness plan as you expand your pool of mentors,graders,tutors etc as they progress upwards/onwards/outwards in to other (new to them) courses.<p>Perhaps Exercism already do this - but in terms of achieving a self-perpetuating growth perhaps part funded initially by local grants, VC etc it struck me as a possibly valid business model that seemed a reasonable fit with his ask HN.