The plain, unadorned truth is, we can't improve on the original model. The old ways were, and still are, the best ways. We have it officially from no less a figure than Euclid himself. When the pharaoh said he wanted to learn geometry, the sage explained the pharaoh would have to study long hours and memorize the contents of a fat math book and the pharaoh complained that would be unkingly and demanded a shortcut. There wasn't then and there still isn't.
Reform movements fail because no one can come up with an idea that works better than the old one.
No more New Math or Whole Language schemes leaving millions of damaged kids in their wake. No more wasted billions. No more seminars, workshops, idylls in the woods to learn the latest fad. No more lost teacher time engaged in meaningless and finally worthless innovations. Instead, resume traditional methods.