In this case, first, research showed that teacher perceptions about students abilities subtly shaped they way the behaved toward the student. Second, research showed that changing behavior toward their students in was more effective than trying to change teacher's perceptions of their students.
In the past, according to the researcher, people tried to reason with teachers to get them to change their biases and stereotypes about students. But this didn't work. This time, they worked with teachers to get them to change their behavior.
Hence, the concluding line to this NPR story: "if you want to change a mind, simply talking to it might not be enough."
Just thought it was worth pointing out since Miles has drawn on social psychology to make just the argument at the list, arguing that changes in the environment, which create changes in behavior are more effective that focusing on changing minds first.
-- http://cleandraws.com Wear Clean Draws ('coz there's 5 million ways to kill a CEO)