Mass introduced standardized testing in the 1990s after universities and businesses complained that too many high school "graduates" were functionally illiterate. The State had to take over a couple of the worst underperforming school districts, which were primarily poor and minority.
Mass got rid of the MCAS requirement for high school graduation. Now, public school teachers and administrators can go back to underserving poor and minority communities, and get back to day drinking.
There needs to be an empirical measures of student performance to hold teachers, administrators, unions, politicians, and parents accountable for public education system performance.