Homework   In the darkness, a grey gaggle of teenage boys, joshing, jostling, explosions of cheap expletives, a fog of Lifebuoy soap and stale body odour, testosterone-topped. Grey school-uniforms dark in the cold evening, occasional sparks struck with fierce skill against the black from steel-tipped heels of heavy Clarks shoes.   Then the neon glare of a classroom light, thirty boys teeming in to “Silence! do your Prep!” and six rows of five pine-topped desks. The out of tempo drum-roll of book-bags hitting the floor, then rustles of pens now silently focussed on paper. Only a whisper is heard from…