Schools deserve much of the blame, but so do the parents.
I recall being in the lower grades, then going home to review my Spelling and my Arithmetic as they called it then.
We used Flash Cards for multiplication tables. They helped.
The family needs to pitch in a little too if the child needs tutoring.
Suckers, send them to public school and then they have to teach it all at home anyhow. Smart, but not too bright, I'd say.
The parents need to take their children OUT of Public school.