ETA: Love it Thea! I tutor high school and pre-college students (elite hockey players who have graduated high school and play in the juniors) in SAT prep. I was just working with a boy today who was confused by how to solve for 1/8 of 48. He really couldn't see why that's the same as 48/8. It took three different methodologies for him to see it. I work with kids all the time (who are past Algebra II in high school math) who have no flexibility of thinking in math - if you don't use the exact magic words or method that they used to learn a technique in middle school, they don't recognize it. I realized that I'm that way too - it took me forever at work to believe that the simplified way to solve a percent change ((final/original)-1) is the same as ((final - original)/original). I'm glad that my kids are learning more than one way to do thing. This of course pre-dated CC by about 10 years in my school district. I have noticed that with adopting CC, there are more explicit goals for the younger kids in automaticity of math facts, which was not emphasized for my two high schoolers. I'm please with the mix of skills - they're expected to have immediate recall of addition, subtraction, multiplication and division facts and that allows them to engage in more complex and creative thinking in solving problems.
Original:
I think it's a few things:
1) people are afraid of change
2) people don't like being told that what they've been doing isn't good enough
3) people will look to politicize everything...because the current administration dared implement these standards, there are some folks who will reject them 'til they draw their last breath
4) school districts that are in trouble may have a tendency to jump on board unnecessary and sweeping curriculum changes in panic mode, saying that they are "needed" by Common Core. Common Core is a set of standards, not a curriculum. It doesn't dictate how children are to be educated, just that they are expected to know certain things at certain points in their education careers. There are plenty of textbook companies out there ready to prey on school districts and sell them magic "Common Core" curricula. Shame on any district that buys this stuff without the input of its department heads, faculty, and proof that it is actually effective.
I am a fan of Common Core. I don't find the standards to be onerous or unrealistic. My state's standards (I live in Massachusetts) were already closely aligned with the final CC standards so adopting them required minimal tweaks. My state implemented sweeping education reform in 1993, including rigorous testing, called MCAS. There was much handwringing and people claiming that the sky is falling, we're ruining education, it's not fair to make kids pass a test to graduate, teachers will be teaching to the test, etc. My kids have all gone to school with MCAS and the results speak for themselves - Massachusetts consistently ranks tops in the nation and competitively in the world in education. Teachers don't "teach to the test," we have plenty of music, art, PE and other enriching education opportunities in our schools, and kids are learning what they need to learn. Pre-MCAS, it was OK for schools to ignore or push through under-performing students. Minorities, poor kids, learning-disabled kids and ELL/ESL students were more or less allowed to fail and still get a diploma. There was no objective way to measure one school district against another, and within districts, no way to measure one school against another. Now, underperforming schools don't escape scrutiny - they get the attention and resources they need to turn things around, or they get taken over by the state for several years of failing to turn things around.
I am proud of the public education that my children receive and know that they are well prepared for whatever lies past 12th grade for them. I think it's tragic that kids in Mississippi, Nevada, Florida and other states with abysmal public schools don't get the same quality of education and aren't as prepared for success in college or career. Education is supposed to be the great equalizer...that can't happen without holding every school, every district, in every state to the same baseline standards for what it means to be educated in America. Common Core provides the bare bones minimum for what students should master. Hopefully most students will exceed these standards, but not meeting them and thinking that it's OK isn't good enough for our kids.