Anyone read Freakonomics? Has a chapter looking at the available data on parenting and academic achievement. Divorce, going to museums, watching TV and reading have nothing whatsoever to do with how well children do in school - at least American children. What does matter is the socioeconomic status of the parents, of course.
The authors, an unconventional economist and a journalist, say bad parenting - neglect or abuse - has an effect, but parents who follow expert advice or all the latest fads designed to help children achieve have no effect at all. Which I thought was comforting.