One of the states being considered for permission to use growth models discusses the prospect

The state superintendent's chief of staff downplayed the state's earlier criticism of NCLB. This is the tack that several states have pursued recently. Many people believe the expectations embedded in the legislation is unrealistic and unachievable. The sense seems to be that it will crash on its own illogical requirements. Instead, it makes sense for states to work on more realistic systems to study growth.

Chris