Kumon and all the other Private after school tutoring classes here in California are filled to the brim with low income Indians, Vietnamese and Chinese students. Many parents work 2 jobs just to make sure their kids can stay in places like Kumon.
Again, it indicates the priorities and desires of the parents. The parents are willing to put in the extra effort to make sure their kids succeed.
And, in the areas heavily populated by Habesha Africans, they also have a strong presence in Tutoring programs and libraries.
No matter how much money you spend on students, the kids with a superior cultural upbringing are going to perform better. high Income or not.
The results from the California STAR exam pretty solidify the notion that cultural superiority helps more than income.
STAR Results for 2012 - Year 2012 (CA Dept of Education)
Asians and South East Asians ( represented by filipino) perform better than or on par with Whites regardless of economic status.