"The time parents spend with their children has a powerful effect on their educational achievement, according to a large study with a novel approach.
Researchers analysed data on children in Israel who lost a parent through death or divorce.
They found that when it came to one measure of a child's academic success, the educational attainment of the surviving or custodial parent had more impact than the educational level of the parent who died or left the home."
I'm always hesitant to listen to research conducted by a company itself touting amazing results, but much of what this company is doing is what needs to happen with curriculum. Of course, any curriculum may be implemented well and often the best teachers are selected for pilots. ;-)