[ktsmith]

> The problem with "Common Core" appears to be that complex procedures have been selected as the way to teach concepts.

This really doesn't have anything to do with common core. Different curriculums that the school districts choose to purchase and implement go about achieving the goals of common core quite differently. Everyday Math is mentioned in another comment and is mostly awful. It's pretty widely used though. We are actually moving to a house in my wife's school district this summer so that our son doesn't go to school where we currently live to avoid both Everyday Math and an equally awful reading curriculum.