00383pab a2200133 454500008004000000100002200040245007300062260000900135300001400144362001100158650001200169700002200181773004600203180718b2009   xxu||||| |||| 00| 0 eng d  aHanushek, Eric A.  aHarming the best: how schools affect the black-white achievement gap  c2009  ap.366-93.  aSummer  aSchools  aRivkin, Steven G.  aJournal of Policy Analysis and Management