<p>Why is it so weird?
Why not compare raw score directly?
what was this system invented for at all?
Just curious.</p>
<p>P.S. please tell me if I have any grammatical errors in second and third sentences :))</p>
<p>to account for slight variations between different testing administrations. One math question wrong in May might be more difficult than in June for example.</p>
<p>@vkracing, It’s designed for your own good. Bottom-line is: IT’S FAIR.</p>