I think standardized testing is unnecessary.
It creates a lot stress for people that don't test well, and a single test is used, which limits the scope of learning. Teachers also end up teaching according to the test rather than teaching them a better understanding of the subject.
Some people believe it creates a guideline for the curriculum, but I think teachers should be allowed more flexibility in creating their lesson plans so that they inspire curiosity and creativity.
If they do make a change, I would suggest allowing teachers to meet the needs of their particular students because
everyone learns at different speeds, allow teachers input on tests that might work better for their students, and ask for students input on testing methods.