The article mentions the chronic absenteeism which is mind blowing: https://apnews.com/article/school-attendance-sick-day-chroni...

I don't see how somebody can learn when they're missing school so much. Math and reading require so much repetition and if you're not in school, you're not getting that time to sit down and do the exercises required to ingrain these topics. It doesn't even matter how a school teaches if the student isn't in class. They're just not going to retain things well.