I think we know how to solve all education problems technically. It's just that the solutions are impractical. Sometimes personalized (expensive management) or require a smart and quick thinking teacher which doesn't scale well, or require hard work doing preparation which teachers don't have the time, motivation, or skill to do, or they are simply effective and leave the kids with nowhere to go while their parents are at work.
If done right, that could be one of the best and biggest revolutions in education. It would be amazing if there was a whole school/system doing it.