As I've stated in posts above the idea of having a nationalized standard doesn't make sense. Different schools have different needs. Different regions/states have different needs. Most standards are written from adults FOR adults.
Money's attached to Common Core. It's not adopted for the actual principles. There's financial incentives.
Here's a "Myth" / "Fact" about Common Core on their own website:
Myth: The standards are just vague descriptions of skills and do not include a reading list or any other reference to content.
Fact: The standards do include sample texts that demonstrate the level of text complexity appropriate for the grade level and compatible with the learning demands set out in the standards. The exemplars of high-quality texts at each grade level provide a rich set of possibilities and have been very well received. This provides a reference point for teachers when selecting their texts, along with the flexibility to make their own decisions about what texts to use.
As an English teacher I promise you that when they say "The exemplars of high-quality texts at each grade level provide a rich set of possibilities and have been very well received. This provides a reference point for teachers when selecting their texts, along with the flexibility to make their own decisions about what texts to use." it's BS. Teachers have less control over what texts that wish to utilize (which is important).
Not only that but these "high-quality" texts the majority of the time are A) repetitive (VERY repetitive) B) tend to be a reading level WAY over the student's heads or too easy C) the instructions tend to be very ambiguous and confusing for the students D)
You may disagree with teachers politically (and believe me I do), but most of them I know legitimately want what's best for their students....and Common Core just isn't it.