摘要:This study aimed to develop and generate a valid, practical and effective alternative assessment based on the principle of mathematics learning using the realistic approach in elementary schools (Sekolah Dasar, SD). This study was a research and development study which referred to the model of educational development by Plomp based on the criteria of product quality proposed by Nieveen, including the criteria of validity, practicality, and effectiveness. This study produced a set of assessment in mathematics learning using realistic approach. Based on the result of the tryout, the generated alternative assessment has fulfilled the criteria of validity, practicality, and effectiveness. The validity of alternative assessment and its assessment sets are in very good category. The result of the testing shows that the alternative assessment is very practical and effective, in terms of the learning process and learning achievement which tend to improve toward the good category. The response of students and teachers towards the implementation of this alternative assessment is also positive.Keywords: alternative assessment, realistic approach