Um, no they don't...

For years, many high schools educated students differently, depending on their plans for the future.

Now, because of all the changes in the world, all graduates will need to have the same knowledge and skills.

NJ STEPS: Redesigning Education
Powerpoint presentation (April, 2008)

I agree with NJ STEPS that the graduation requirements could use a little tinkering--I'd start by requiring Logic 101 for anyone who thinks the above makes sense.