<p>I know how the USAMO qualificiation works, but what about the others?</p>
<p>My school has a chemistry one, but no physics, bio, astro... How do you take the exams then?</p>
<p>I took the USNCO(chem olympiad). I think my teacher nominated me for this thing and i got chosen out of the applicants in the DC metro area. So two people represented our school and took the test in DC and got free lunch. It was really nice but do cover some organic chemistry because many problems r like concept from general chemistry + some weird organic chemical</p>
<p>For the USACO (Programming), you just have to participate in the online contests they have, and the top 15 in those contests get to go to the training camp.</p>
<p>there's an astro??????</p>
<p>Only Math, Computer, Biology, Chemistry, Physics</p>
<p>There's definitely an international astronomy one, but I'm not sure if there is one in the uS.</p>
<p>This year's bio + physics first rounds are already over</p>
<p>I didn't know this, but apparently there is an International Linguistics Olympiad...the US doesn't participate...</p>
<p>ILO...weird...</p>
<p>There is an astro Olympiad test as I just wrote it last weekend for my region (giggles evily). We're administering it next Saturday here... in short the way the grading works is we see who does best and, in the event of a tie, we see who does best on the tiebreaker questions that we write so no one will get perfectly. We then report "so and so got first" and "so and so got second" so the actual number of points means little by itself.</p>