The goal of this policy was to implement more standardized testing and to then hold schools accountable for the results.
The policy's intentions were good: have high standards and measurable goals.
However, the main criticisms were that the policy did not take into account students with disabilities or non-native English speakers, and it focused too heavily on math and reading. Furthermore, it put a financial strain on states without providing them with enough funding.
It was later replaced by the Every Student Succeeds Act in 2015.