It's actually 15 if you think about it Zoltan, and it's genuinely sick.

At 18 most kids decide which college they'd like to go to, but in order to get into their program of choice they have to take a certain curriculum of courses throughout high school..

For example a person trying to break into the engineering stream would start with an introductory physics course in their sophomore year, and end with an AP Physics C class in their senior year...

That is scary.