FromThe Dallas Morning News: Since Michael Hinojosa became superintendent of the Dallas school district five years ago, supporters and critics alike say that he has jump-started academic improvements that have garnered national attention. He's revamped curriculum, boosted test scores, groomed new principals for tough schools and helped persuade voters to approve a $1.35 billion bond program for new buildings and long-ignored repairs. But a budget crisis that rocked the district in 2008 and sparked massive teacher layoffs has been Hinojosa's Achilles' heel.