Many teachers would tell us that classes today are not the same as twenty years ago. That includes the fact that the student body has been becoming more fluid, more diverse (https://www.greatschools.org/gk/articles/cultural-diversity-at-school/), less uniform (by all possible measures). More and more ideological emphasis is being placed on individualization of teaching (which is a hot and controversial topic: http://www.springer.com/us/book/9781402036194).
Interestingly, English language uses a different word structure for (at least some) professions which have a creative nature. Take, for example, a professional who makes locks. This profession does not exist anymore, but the in the past, one who made locks was called a locksmith. He was not called a locker (or unlocker), because that would mean “one who locks or unlocks locks”. Those days every lock had to be created.
Obviously, I am in debt to my parents, my teachers, my mentors, friends, and colleagues; without them I would never have become who I am now.
One of the most efficient methods for advancing a new type of teacher professional development is called “Professional Designing”