<p>With classes of about 400 or so the whole grade is meant, so if someone is ranked 1/500 he has the highest overall GPA in his whole “Stufe”.
Wereas your 1/14 would be your rank in your math class, not your rank compared to other students of your grade not taking your math class. </p>
<p>If this sounds confusing, or didn’t just doesn’t make sense, due to typos or other stuff, PM me and I’ll explain it in German.</p>
<p>I am not sure though if the whole ranking system applies to internationals, since many schools in other countries do not rank per se.</p>