This study aims to produce valid and practical PISA math model. The type of research is development research which adapt the model of Tessmer. Researches conducted two stages, which are preliminary stage and prototyping (formative evalution) stage. The preliminary stage consists of analyzing students, analyzing curriculum and analyzing PISA problems. Meanwhile, The prototyping stage consists of self-evaluation, expert reviews, one to one and small group. Subject in this study were students of class VII SMPK Putri St. Xaverius Kefamenanu, Timor Tengah Utara, Nusa Tenggara Timur. The results of this study was valid and practical 8 items PISA math model. The validity of contenct, construct, and language was based on validators judgment and the practicality was measured in small group.