(Preface: I am not a teacher, and I understand this is a hot take). At the end of the day there's an unwillingness from every level of education (parents, teachers, administrators, school boards, etc) to fight against the assault on intelligence by tech.
I don't think kids should have access to the public internet until they're adults, and certainly should never have it in schools except in controlled environments. Schools could create a private networks of curated sites and software. Parents don't have to give their kids unfettered access to computers. It's entirely in the realm of possibility to use computers and information networks in schools, accessed by children, designed to make it impossible to cheat while maximizing their ability to learn in a safe environment.
We don't build it because we don't want to. Parents don't care enough, teachers are overworked, administrators are inept, and big tech wants to turn them into little consumers who don't have critical thinking and addicted to their software.