Let's see Common Core was released in 2010 and by 2014-2015 most states had implemented it. Lets do the math, 2026 - 13 = 2013. Hmmm... You can say funding all you want but in the same 13 years of Common Core funding per student has increased by 50%.
Except these are results for 2022, and they are significantly down from the levels in 2019. All kids in either cohort would have spent their entire school years with common core education.
It leads to K-shaped education where parents who recognize the deficiency of public education simply teach their kids math themselves or hire private tutors. Public education used to be a force for equality of knowledge in the country. Now it perversely does the opposite, all in the name of education!