AI- changing a student into a number

<p>ok...
i heard a lot about AI and about how prestigious schools use a system where they some how put together your SAT scores, SAT2 score, and GPA/ranking into a number and that number basically decides if you get in or not.
there are somethings that i would like to know.
does anyone know how to calculate such an important number? is it different for all schools? what is the average AI rating that get into a prestigious school?</p>

<p>Check out the front page for CC. Towards the bottom are smaller rectangles with their titles in red AI is short for Academic Index.</p>