Isn't' this IQ? "Educable” seems like the latest iteration of 'multiple intelligences' or the 'street smarts' vs. 'book smarts' distinction.
Most people, including "intelligent" people, have no clue how learning works. Learning scientists actually study student perceptions of their learning and learners are terrible at selecting appropriate learning techniques. Even when forced to use effective learning techniques, they rate the effective strategies (as determined by their outcomes) as least effective.
We need to start teaching people how learning works to begin with.
Not sure what you mean by this - it's certainly not something a single-day IQ test could possibly measure! The primary reason IQ is a discredited measure of intelligence is that people are perfectly able to learn how to perform better on IQ tests - any supposed influence of "intelligence" on IQ scores is hopelessly confounded with how much you've practiced similar tests / trivial logic puzzles / etc.
This stuff about "attempts to broaden the definition of intelligence to something that is more inclusive" is backwards. The whole problem is that nobody has managed to scientifically define (let alone measure) intelligence in any vertebrate species. IQ is dangerously misleading precisely because it is so narrow: its precision makes claims about IQ seem quantitatively rigorous when they are qualitatively meaningless.