摘要：This research aims to analyze the feasibility and validity of the assessment instrument used to measure students' Higher Order Thinking Skill (HOTS) in Environmental education learning. The Borg and Gall development model was modified in the following stages: (1) Information collection, (2) Making plans, (3) Form preparation, (4) Revision, and (5) Product implementation. Data were obtained from 134 students of the population and Environmental Education Study Program at Jakarta State University, using 25 question items in the form of HOTS multiple choices. Meanwhile, QUEST was the analysis technique used to examine the validity, reliability, difficulty level, and questions' differentiator of the data. The result showed that the features of the generated assessment instrument are feasible and valid as alternative in assessing students' HOTS..
