standardized testing evaluates a student's performance on one particular day and does not take into account external factors.
there are many people who do not perform well on tests.
many of these also students are smart a the content,but it doesn't show on the test.
many students also develop test performance.
there are so many external factors that play into test performance.
if a student has an argument with their parents the morning of the test, chances are their focus isn't going to be where it should be