It's obviously a good thing to consider all forms of evidence when providing performance feedback to employees. But teaching is not like golf, you can't reduce it to a single score for one contributor.

New York and Boston are home to the publishers; metro D.C. is home to the giants of learning online. But the Bay Area is poised to lead the learning revolution.

The old formula -- get a degree, get a good job, have a good life -- is breaking down. More people are attempting degree programs but many of them didn't receive adequate preparation in high school.

While US schools will soon produce higher achievement and better preparation, cheap tablets will for the first time connect millions of students in developing economies to high quality secondary education.