Eventually you get to a level where the answer hasn't been taught much and so there is no standard, but that only happens late in your education.
Of course education itself needs more research. "learning styles" was debunked last I heard, but is there some variation that says some people need different teaching? Is there a better way to teach things? However if you are not involved in this research you should be teaching in standard ways that have been proven to work.
The commodification of education will eventually make it useless. Universal, bespoke education is the ideal, but it's usually prohibitively expensive.
As you get beyond those basics you have to become an expert in something that there are few experts in. McDonald's success is mostly based on their ability to take you from zero to a productive crew member fast. It takes many years to make a brain surgeon, in large part because we haven't commodified it - if we needed more we should (but since the world doesn't really need many it isn't worth it)
If you want a system that appeals to a plurality, and leaves the rest behind, commodification will deliver just that.