Rating teachers A new study by Harvard and Columbia economists showed that students of teachers with a high value-add score -- a complex mathematical formula that claims to measure a teacher's effectiveness -- fare better later in life.9:06 a.m.
John Friedman: assistant professor of public policy at Harvard Kennedy School.
Ninive Calegari: president of The Teacher Salary Project.
Obama's Keystone XL decision President Obama has rejected, at least for now, the Keystone XL oil pipeline that would run from Canada to the Gulf Coast. Darren Samuelsohn, senior energy and environment reporter at Politico, joins us from Washington to discuss the decision.10:40 a.m.
Darren Samuelsohn: senior energy and environment reporter at Politico.