Maybe the whole concept of "teens" became necessary when the society changed from agricultural to technological - there is just so much more to learn before you can be a "proper" adult... you could be a productive member of 1800's society without knowing how to read, write or do maths.
And the trend (more and more learning needed) will probably continue, judging from the stuff my teen kids are doing in their last 2 years of high school - things that I came across in my honours year of engineering (e.g. electronic data acquisition) are now taught in year 12. Wow.
And the trend (more and more learning needed) will probably continue, judging from the stuff my teen kids are doing in their last 2 years of high school - things that I came across in my honours year of engineering (e.g. electronic data acquisition) are now taught in year 12. Wow.