[asimeqi]

Short term one get can rid of test scores or GPA since they indeed seem to be correlated. But long term:

1. If we get rid of test scores, it would cause too much upward pressure on GPA which would make GPA less reliable. There are tens of thousands of high schools in the US. Even if the GPA distribution inside every high school is correct, how do you compare with GPAs from other high schools? And from experience I can predict that, once people realize that only the GPA is important, there will be outside influences (i.e. pay the teachers for good grades) that could cause even the distribution of GPA inside one school to not be correct.

2. If we get rid of GPA, students could just study for the test with obvious disastrous effects for their education.

We need both GPA and test scores to keep both of them in check.