ACT and SAT each have their own parts of the country. The GRE has its lock on graduate admissions. And so one could blame the companies but really economically they have no incentive to change things very much because they're getting the business.
There is no recipe to be a great teacher that's what is unique about them.
If you're picking your best friend based on what kind of clothes she wears or...
In one century we've added 28 years to our average life span - a change so rapid that our brains couldn't possibly have evolved to accommodate it.
