What will survive as states test Common Core?

Aired: 12/25/2014 | 0:07:39 | Clip
In 2008, a set of academic standards for U.S. public schools called the Common Core was created for states to voluntarily implement. Intended to raise the bar for American students and teachers, many states that originally signed on are now rewriting the standards or opting out altogether. Special correspondent John Tulenko of Learning Matters reports.