Any religious primary school in America has this issue. Religious universities less so but still problematic.

The Hasidic yeshivas in NYC are notorious for this. Out of 27 investigated in an 8 year long probe only 4 passed the minimal requirements.

There were "graduates" who never learned English, had no concept of science, no grasp of any history outside of biblical...

They passed a law in 2022 to require schools to pass minimal standards. There are more than a hundred of these schools in NYC.

It is unclear how effective the law has been.