<p>So what happens if your school doesn't do that? I've always wondered.</p>
<p>The academic index was used to rank athletes in the Ivy League [I think it's still used]. </p>
<p>Academic</a> Index3 - College Confidential</p>
<p>According to the scale, first they go by exact rank, then decile, then quartile, then GPA. </p>
<p>If your school doesn't give a GPA, the school will calculate it based on your grades. Many schools recalculate GPA regardless.</p>