This study was to validate questions based STEM for elementary school education students, they are categorized as quantitative descriptive. The product of this research was aimed at class 2019 elementary school education students of Universitas PGRI Ronggolawe Tuban (UNIROW). The research time was started from April 2020 to July 2020. These products have not been tested extensively because they have been hampered by the Covid-19 pandemic. The questions based STEM developed were essay questions consisting of pretest questions, practice questions, and posttest questions. Each question shows one of the STEM ability profiles. The validation results show that all aspects of the assessment have very good criteria. The aspect that got the highest percentage score was the content suitability aspect with a score percentage of 84.38%. While the aspect that got the lowest score percentage was the graphic aspect with a score percentage of 82.14%. The language aspect got a score percentage of 82.50%
