[GSlob]

Well, 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, the speed with which one learns, and the limits on one's capacity to learn as well. 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]. Transfer between adjacent streams ought to be made possible - both ways [one could drop down or - with effort - try to move up].

[AbeKrieger]

the only reasonable solution would be rigorous streaming by capacity

Sorry, but that's called racism in these horribly PC United States. And THAT is a fact. Remember, if we can't all achieve equal greatness then we will all be held down to equal mediocrity.