Your interests, studies, and work.

Well done! I can boast about participating in the geography and chemistry Olympiads; the latter was recently, and I think I took 2nd place. It's an inter-school competition, so it doesn't really matter. I'll go to the district one next.
It's a shame I took 2nd place; I scored 41 out of 60 points, and no one else scored that high, so you could say I was 1st, but 2nd in terms of points.