No Child Left Behind (2001) is the latest revision of the Elementary and Secondary Education Act (1965). NCLB creates a high-stakes testing culture in America, and is highly disruptive to student's educational process. Many original supporters of this bipartisan legislation are now against it.
The states currently set their own test and level of proficiency, and many states just decrease the "passing" level to keep their statistics high for state/government funding and recognition. Teachers are expected to alter their curriculum to teach what will be on the test, even in high performing areas, causing student education to be blocked by standardized testing benchmarks and checkpoints, and 1-2 weeks of class lost to testing time. This legislation hurts students, teachers, and schools.