This paper describes a qualitative study about pedagogic practices in the family. The pedagogic code underlying family practices is characterized and related to specific social groups. Students' achievement is discussed in relation to family and school pedagogic practices. The analysis of family pedagogic practice was based on a model derived from Bernstein's theory. The model considers two main dimensions, the coding orientation and its specific realizations in both the instructional and regulative contexts. It provided indicators of the family discursive context and the form in which knowledges and values are transmitted. The model developed allowed a deep and delicate analysis of the family socializing context. The study showed that families differ in their coding orientation and pedagogic practices, and suggested that there are factors other than social groups to determine family's pedagogic practice. It also suggested that specific familial practices may explain children's differential achievement at school.