This article, by Jo Boaler, for The Atlantic really struck a chord with me. It makes a strong case for why changes to how we teach math need to be made.
In particular, this quote spoke to me:
"In mathematics education we suffer from the widespread, distinctly American idea that only some people can be “math people.” This idea has been disproved by scientific research showing the incredible potential of the brain to grow and adapt. But the idea that math is hard, uninteresting, and accessible only to “nerds” persists."
The article does not claim that the Common Core State Standards are perfect, but it does discuss what is good about them and how they may help math education in America. It's a good read for all educators… not just math teachers!