Amen! Children who grow up in a home where with parents who value education do well in school. Children who grow up in home that do not value education do poorly. PERIOD. Highly trained teachers, smaller classrooms where children can get more individualized attention, better resources, can help, but not nearly as much as quality parenting.
The highest performing school system in the state of Indiana is in a suburb just North of Indianapolis. It is a unionized public school system. Many of the poorest performing schools in the state are in downtown Indianapolis (both public and charters, btw). If one were to switch the populations around, (the suburban children were shipped into town, and the urban children shipped to the suburban school), there would be little, if any, change in the scores of either population...because, generally speaking, the suburban children are raised with the expectation that they will work hard in school, go on to college, and land a well paying job. Conversely, generally speaking, this is not the case for inner city school children.