DISD superintendent resigns11:38 AM CDT on Wednesday, July 14, 2004By TOYA LYNN STEWART and JOSHUA BENTON / The Dallas Morning News Mike Moses announced Wednesday he is leaving the Dallas school district after 3 1/2 years leading Texas' second-largest school district. During a news conference at DISD headquarters, Dr. Moses said he informed board members in a letter early Wednesday morning. His last day will be Aug. 31. "Here's the deal: I'm tired," he said. Dr. Moses said the job of DISD superintendent is "enjoyable and exhilarating, I think, but only for a period of time." "I really thought when...