A growing body of research has examined how cultural capital, recently broadened to include not only high-status cultural activities but also a range of different parenting practices, influences children's educational success. Most of this research assumes that parents' current class location is the starting point of class transmission. However, does the ability of parents to pass advantages to their children, particularly through specific cultural practices, depend solely on their current class location or also on their class of origin? The authors address this question by defining social background as a combination of parents' current class location and their own family backgrounds. Using data from the Panel Study of Income Dynamics and its Child Development Supplement, the authors examine how different categories of social background are related to parenting practices and children's academic achievement. The results offer novel insights into the transmission of class advantage across generations and inform debates about the complex processes of cultural reproduction and cultural mobility. (Contains 10 notes and 8 tables.)