March 6: As states have sought waivers from the 100 percent proficiency requirement of No Child Left Behind, new performance targets were put in place that led to differing expectations for children depending on their race. NBC’s Rehema Ellis reports.  (Nightly News)As states have sought waivers from the 100% talent requirement of No Child Left Behind, new efficiency ambitions had been put in situation that led to differing expectations for kids relying on their race. NBC’s Rehema Ellis studies. (Nightly News)