Teachers and parents have had very different goals for quite a few decades now.
To a large degree that's a true statement. I think if you directly engage your children's teachers though, you get quite a different story than that echo'd by the teachers unions.
As one example, I know each and every one of my youngest son's high school teachers. I've met them all. I also knew all of my oldest son's teachers over his four years in high school. To a person each and every one of them HATES "common core" and wish it would be ended. At least that's true for the high school teachers I've met.
The Teachers Union leadership on the other hand seems to love it.