The nation's public schools are poised to welcome an unprecedented 49.6 million pre-K-12 students as this school year opens, but whether individual school districts see an increase in students depends a great deal on where those districts are located. The increase--a projected rise of 1 million this fall from the 2005-2006 school year, the most recent national numbers available from the federal government--continues a 10-year trend, with statisticians predicting that schools in the West and the South will receive more students, while schools in the Midwest and the Northeast will experience a decline. However, when it comes to particular school districts, those broad patterns can play out very differently; administrators in some districts that have already started classes report enrollment that does not match national trends.