The Associated Press reports that Education Secretary Margaret Spellings is going to examine a loophole that allows schools to omit the test scores of nearly 2 million students under the No Child Left Behind Act. At the conclusion of a four-day Associated Press series of the issue, Spellings said in a conference: “When children are not part of the accountability system, then that’s a problem.” Spellings said the report amounts to a “truth in advertising” exercise for parents, federal officials, and state policymakers. Spellings has not specified exactly how she will address the issue–but noted that it will come up with next year’s NCLB renewal and federal reviews of state education plans…