This study focuses on the gender differences in the Oromo cultural way of knowing, and the implications for nonformal education designs. Nonformal education programs have become an important tool in the sustainable development field. Plenty of resources are being poured into delivering nonformal education programs, but they usually do not attain the desired transformation for participants in terms of knowledge, skills, and attitudes. One reason for this is the fact that nonformal education designs do not always take into consideration the cultural ways of knowing of their target population. Since how a person knows and learns is influenced by culture, gender and socio-economic status, it becomes crucial to understand cultural ways of knowing, and the gender differences within that culture, in order to design and deliver transformative nonformal education programs.