[GSlob]

"Even though I do believe all students can learn..."
Everyone has one's limits with regard to everything - be it the speed of running, the weight one could lift, acuity of hearing and vision, mental sharpness [IQ] and - necessarily derivative - ability to learn and the limits on one's capacity to do so. Thus everyone could indeed learn, but some will reach their limits at rudimentary reading and multiplication table within 6x6, while others would not reach theirs in MIT postdoctoral programs. And everything in between, of course.
Thus the only reasonable solution would be rigorous streaming by capacity, with different curricula [and different schools] for each stream. Say, one could use the traditional set of 5 streams: retardees[IQ<=70], dullards [71<=IQ<=90], normals [91<=IQ<=110], brights [111<=IQ<=130] and the gifted [131<=IQ]. Transition between adjacent streams ought to be made possible - both ways [one could drop down or - with effort - try to move up].

[Ninian Dryhope]

Good post and great idea, but we both know that will never happen and why it will never happen.