The push for standardized tests has one goal: Prove students are failing.
If you can show students are failing, then you can blame teachers for the failure. If you can do this, then corporations can rush in to "save" them with new course materials (bought with millions in taxpayer money, of course). Even better, the corporations (e.g. Pearson) run the standardized tests, grade them, and aren't held accountable for the test quality or grading accuracy. So Pearson can make the tests show that kids are failing which leads to more Pearson sales to "help our kids succeed."
It gets even worse when my state's governor (Cuomo) talks about enacting the "death penalty" on public schools that don't hit marks he sets for the standardized tests. Meaning, he'll close these schools down and replace them with charter schools - business run schools that are exempt from most testing and can choose which kids to accept and which they will reject.
With two kids in public schools struggling under EngageNY, my wife and I are right in the thick of this. We're part of a growing group of parents who refuse to allow their kids to take these high-stakes tests, despite FUD and push-back from people who want more testing.