<![CDATA[The aims of this study is to describe the feasibility and practicality of the STEM EDP-based science process skills assessment instrument in elementary science learning. The research method used is Research and Development (R&D) with the ADDIE model. Data collection techniques, i.e.: interview, work show and questionnaire. Research instruments consisting of interview sheets, assessment rubrics, expert validation questionnaire sheets, practitioners and student responses. The results of the research obtained are: 1) The analysis stage consists of a needs analysis. 2) The design stage, namely designing a STEM-EDP-based science process skill assessment instrument in elementary science learning is adjusted to the material in the science book chapter 4 changing the form of energy, Topic A: energy transformation around us. 3) Development stage, namely developing products and conducting validation tests of experts and practitioners. All data was obtained using a questionnaire submitted to the validator. The results of the expert validation test received an average percentage of 84.72% in the "Feasible" category. The results of the practitioner validation test received an average percentage of 93.06% with the category of "Very Practical". 4) The implementation stage is to apply the developed product to a test group involving 18 students. The results of product trials in each aspect of the indicator get the lowest percentage of 75% and the highest 100%. Then, the students' responses received an average percentage of 83,46% with the category "Positive".]]>
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