More than 15 years after its publication of influential national standards in mathematics, a leading professional organization has unveiled new and more focused guidelines that describe the crucial skills and content students should master in that subject in elementary and middle school. The National Council of Teachers of Mathematics released…

The proportion of public schools' meeting their prescribed achievement targets under the No Child Left Behind Act appears to have fallen slightly in the 2005-06 school year, while the percent classified under the law as needing improvement increased. The trends bear out earlier predictions that schools would find it increasingly hard to show…