The high school system in my area has been teaching CAD for at least the last five years.
My daughter took the introduction to CAD in her junior year in high school, and took advanced CAD her senior year. She just finished her junior year in college and took a class with Applied 3d Printing CAD.
It is somewhat akin to when the middle and high schools in the mid 70's began having computer electives for this new-fangled PC thing 
(I was high school class of 81).
We learned BASIC, and fundamental, early-adoption graphic programming.
So, kids are learning 3D Printing these days. One of the large electronic supply stores near me sells all kinds of 3D printing materials, and even offers courses for people.
Again, just like places did when computers began to hit the consumer level.
Edited to add: I recently printed two small pieces for one of my race cars (1:1 scale 
) that the repro houses did not have. I was also able to modify them in the design to fit how I wanted to use them.
