"Test the Kids"
In this video from the Educator Roundtable, you'll hear (over and over) the most common criticism of NCLB: It requires too much testing.
What strikes me is the repeated images of President Bush. As Eduwonk notes, polling shows that respondents support the general concepts of NCLB. But that support fades once they're asked a question that identifies those concepts with NCLB. Because the name is so closely associated with the president, maybe his unpopularity (as shown in polls here and here) will hinder reauthorization.