https://phys.org/news/2018-05-high-principal-student.html > "Our findings offer evidence that district leaders can identify their effective principals," said Grissom, associate professor of public policy and education. "The principals they evaluate more positively against the state's instructional leadership standards see better outcomes for both students and teachers." > "We are excited that this promising evidence regarding strong school leadership can add to the important conversations happening across Tennessee on the power of principals," said Erin O'Hara, executive director of TERA.