This study aims to develop textbooks for Indonesian Ethnography courses based on case methods and team-based projects. The Research and Development method uses the 4-D Thiagarajan model, starting from the defining, designing, developing, and deploying. The research population is all Department of Anthropology Education students who have studied Indonesian Ethnography. The sample was divided into three parts, namely three students for individual evaluation, ten students for small group evaluation, and forty students for field testing and conducted randomly. The study results indicate that the concepts in the Indonesian Ethnography textbook are related to the representative ethnic culture patterns on five major islands in Indonesia, namely the Acehnese, Batak, Nias, Minangkabau, Javanese, Balinese, Dayak, Toraja, and Asmat. Textbooks are valid with a score of 4.43 and SLP with a score of 4.35. This research becomes a reference for the development of textbooks using various socio-cultural cases and projects.