Allowing High school students to graduate early??

I have mixed feelings that allowing high school students to graduate early. I agree that some students are highly capable to doing college coursework early. Also, after a student is 16 years old, they tend to feel that high school is simply a prison and they want to get out. However, even if highly capable students are ready to move on to college at an early age, but are they ready in a social sense?

Also, in determining if the student is ready to graduate high school early, they are given an International evaluation test. Is this done on top of the state's exit exams? I have a feeling that would be correct, which is a shame because it put more stress on the student. However, there needs to be another way of evaluating a student other than simply just giving them high-stakes multiple choice exams.