From The Huffington Post:

Most teachers have long known that they affect the life chances of children. But it took the work of economists to convince the world of public policy to take seriously what is now known as "teacher effectiveness."

Now one of those very same economists has turned to another subject that, to most teachers and principals, is similarly self-evident: Principals, like teachers, affect the life chances of children, too.

Read the full article at The Huffington Post...