摘要：The purpose of this research is to develop unbiased and standardized instruments to measure student achievements that can be used for several subject matters in senior high schools and junior high schools. This was a research development study carried out in two years. The result of this research in the first year was a draft of an unbiased and standardized instuments for student achievements. In the second year, the draft of the unbiased and standardized instruments was disseminated to several mathematics teachers in senior high schools and junior high schools in the provinces of Yogyakarta Special Territory and Central Java. After the revision, the instruments were disseminated again to mathematics teachers in senior high schools and junior high schools in the provinces of Yogyakarta Special Territory, Central Java, and Nusa Tenggara Barat.Keywords: unbiased instruments, standardized instruments
