I would not deny that the US had a terrible problem in math and several other subjects compared to other countries in the world.
However, that is not the point. Even here in Ontario, Canada where the kids scored quite well in international comparisons, what the government did many years ago was to simply increase the standards rather than increasing the quality of education by properly supporting our school system. Teacher burnout is rampant, and teachers get very poor support from the provincial education system. And the US is facing the same problem. If you want to compete with the heavies, such as China and India, he don't do it by just demanding more and more and more and more from the students. You increase the quality of the education system, by providing the necessary support for the teachers themselves. For example, you provide math teachers with the proper mathematics training, not just in the substance of the topic, but also in modern techniques for teaching math and making math fun.
Instead, here in the Toronto education system, they invent new terms such as "student directed learning", and "exploratory learning", which basically means "do it yourself, kid."