A Levels are 2-year courses, sat when a student is about 18, before they enter college/university.
You can get past papers (for the Cambridge-Singapore syllabus) by checking out http://www.seab.gov.sg/aLevel/aLevel.html
Thanks for that AMonk. I actually didn't realize that A-levels are two year courses. Interesting.
Without saying too much, I am thinking about going to a school that has an A-levels program. Most of the students, however, apparently DO want to go to the USA. Speaking with them, I've been trying to convince them to switch over to an AP program, since it seems to me that A-levels are not very widely understood or taught in America, but they are resistant for some reason.
I am a little bit hesitant myself because I am not really familiar with A-levels. Since, as I understand, they are the equivalent of college coursework, I do not imagine the standards would be so very different from AP, but I could be wrong.