Chicago public schools braced for a "logistical nightmare'' Wednesday, revealing that an estimated 250,000 students could be vying for only 5,000 seats under tough new federal standards designed to free students from failing schools. Officials released tentative data showing that 368 schools--or 61 percent of all city public schools--could have to offer transfers to 54 higher-performing ones under the "choice'' provisions of the No Child Left Behind law. "With such a long list of schools eligible for choice, following the law becomes a logistical nightmare,'' Chicago Board of Education President Michael Scott said. Statewide, an estimated 209 additional schools also...