Sam Dillon has a great article in today's New York Times which illustrates the wide variation in the number of schools making "adequate yearly progress" under No Child Left Behind. He writes,
A state-by-state analysis by The New York Times found that in the 40 states reporting on their compliance so far this year, on average, 4 in 10 schools fell short of the law's testing targets, up from about 3 in 10 last year. Few schools missed targets in states with easy exams, like Wisconsin and Mississippi, but states with tough tests had a harder time. In Hawaii, Massachusetts and New Mexico, which have stringent exams, 60 to 70 percent of schools missed testing goals. And in South Carolina, which has what may be the nation's most rigorous tests, 83 percent of schools missed targets.
In December, Fordham and the Northwest Evaluation Association will release a new study--a follow-up to last year's Proficiency Illusion--which will dig into this state-by-state variation and show that the tests alone are not to blame.