Comments

Common core is teaching kids to understand the meaning behind why the math works. Not just 'here is how you multiply and add'. This is how kids are able to find new strategies that work for them. Common core is great when you have good teachers and politicians who know what they are talking about.
Besides that, it's the same all over the country, meaning that what kids learn in one state and in one grade is the same if they move that year to a different state. They won't be far behind or ahead.