I'm a high school teacher, so I'll give you guys a perspective that may or may not be new.
Not a single one of you have touched on an issue that doesn't seem to get any attention. The groups that lobby for these standardized test are very often the same people that design and sell these tests to the state. Standardized testing is a multi-million dollar industry. I look at these tests as a slap in the face. I have a professional degree in every subject I teach and a teaching certification. I know what I'm teaching, I know how to teach it, and what I teach is valuable. Standardized testing assumes two things: 1) students are standardized, meaning that they all learn the same subjects the same way to the same degree; and 2) as teachers, either we're not doing our job adequately and/or they just don't trust us. All students learn to different degrees and some do better in certain subject areas. I stunk the joint up in math, but I graduated from SWT with a 3.9. My SATs and ACTs weren't great either. Standardized testing takes account of none of this.
I also take offense to the idea that educators insert a political bias into their teaching. One of the classes I teach is journalism, so I know something about being objective. The majority of teachers I know in both high school and university do an excellent job of presenting ideas from as many perspectives as possible. We got into teaching because we're passionate about what we teach, we enjoy working with the kids, and we want to help future generations succeed. It certainly isn't because we're trying to push an agenda onto the minds of kids.
Actually, I got into teaching to make lots of money!!