Highly recommend reading about the ‘whole word’ v ‘phonics’ wars. Generations of children have been and continue to be left behind because an ineffective teaching style that doesn’t work became popular among America’s educators. Here’s an oped from a few years ago to get started with. It's honestly a bit depressing, but things have gotten better since and Mississippi is the proof of that.
https://www.apmreports.org/episode/2019/08/22/whats-wrong-ho...
Some reading specifically on how Mississippi is responsible for their own success. It wasn’t magic: https://www.nytimes.com/2022/10/06/education/learning/missis...