Numerous studies say yes. In an experiment run by a school district in Pennsylvania, students taught in an environment that eliminated standardized testing in daily use ultimately had better grades than those who did not.
Do standardized tests affect your grade?
If you have high grades and low test scores…
An A at your high school might be a B at another school, or vice versa.
Why standardized testing is bad for students?
If a student performs poorly on a standardized test, they can face increased pressure from their parents and peers to do better and be “smarter.” This can lead to students resenting learning and believing that they are worse than everyone else because of their low score.