Your approach, I call the "classical approach," isn't new, it was applied in public schools between their origin, and 1960, but then it failed: Thus the rise of other methods. I have very little basis for speculating what happens in private parochial schools, but as such, they do have the OPTION of taking any student that darkens their door. This is a tremendous "benefit" that doesn't exist in any public school.
For the past 50 years, your approach to public education has been recognised as inadequate. The "Head Start" program doesn't employ the methods you've mentioned, but is merely a preschool program the DOE offers for poor kids.
students who excel in school are touted by the school system to have parents who value educational achievement. this happens in the public school system, just like anywhere else. public schools acknowledge that this is the case. what is the public school response? appropriate less value to educational achievement to curb...

... 'hopelessness'. wtf?
what i contend to be effective has happened in public schools all along, despite their policies. for all successful students, an attachment between performance and grades, grades and success has been cast in stone. this system certainly didn't fail circa 1960. students with better grades have learned more at school; there's no hokus pokus about not learning, just getting grades. these students have also demonstrated the ability to conform to a set of instructions based on a result for an extended time: this is the formula for making a living in a society like ours, for occupations from laborer to chief exec.
you are claiming that these public school methods have been applied to put out people who can get ordinary jobs just as well as extraordinary ones. i argue that these new systems have failed to do so where the system in the 50s and 60s did great. jobs, even the ordinary ones which i drew anecdotes from earlier, aren't based on having someone soak up 8 hrs a day with arbitrary effect. instead, many job descriptions call for 'results-oriented' individuals in an effort to weed out the losers produced by the tactics which you're defending.
again, these practices run against the grain of intuition.
i dont believe in your failure conjecture about schools in the 1960s. can you substantiate that a crisis is what brought about this bullshit? i have an entirely different theory.