@Egghead: This is a bit hard to answer. It really just depends on the country. For example elementary school in my country starts at the age of 6 and ends at the age of 15. Then you go to the next school for about 4 years(could be longer depending on how many classes you take each semester and how many you fail), which would be considered a high school but is equivalent to a college. So I guess there is no middle or high school... Just elementary and then college.
So if we're going according to that Drew and Cameron are both in college. Drew being 16(first year) and Cameron 18(third year). And almost everyone here around that age drinks. :)