And to compound this pressure standardized testing is putting teachers under the thumb. There's an obscene amount of paperwork required and it takes the focus away from students. In today's environment standardized testing is a step back, in the 1950 it would have made sense. A better approach would be to emulate the Finnish curriculum which is ridiculously fluid. And it works, they're currently one of the highest achieving nations.
To be frank I suspect the standardized testing methodology was employed as a part of a conservative agenda to ensure private schools have an advantage. It seems to have spread globally under conservative governments in suspicious circumstances. In New Zealand it's called 'National Standards', and was introduced at the same time charter schools started receiving government funding.