In terms of math achievement, we are still where we were in 1893 when the report A Nation at Risk was released.

https://www.reaganfoundation.org/media/130020/a-nation-at-risk-report.pdf

In April 1983, the National Commission on Excellence in Education formed by then-U.S. Secretary of Education Terrel H. Bell released the report A Nation at Risk. The most famous line of the widely publicized report declared that “the educational foundations of our society are presently being eroded by a rising tide of mediocrity that threatens our very future as a Nation and a people” (U.S. Department of Education, 1983). https://www.edweek.org/policy-politics/a-nation-at-risk/2004/09

In 2022, American 15 year olds still score beneath the world average in math.

https://www.oecd-ilibrary.org/sites/02f44b44-en/index.html?itemId=/content/component/02f44b44-en