Developing an Authentic Assessment Instrument of Exposition Text Based on Higher Order Thinking Skills (HOTS) in Class X Students of Senior High School

The learning process and assessment instruments provided had not been oriented to develop students’ high-level thinking skills. This study aimed to describe the process of developing the authentic assessment instrument of HOTSbased exposition text in class X State Senior High School 1of Bandar Bener Meriah; describe how the feasibility of authentic assessment instrument on HOTS-based exposition text, and describe students’ learning outcomes by using the authentic assessment instrument on HOTS-based exposition text. This research referred to the development model of Borg & Gall. The findings of the study showed that: (1) developing the authentic assessment instrument on HOTS-based exposition text was based on research and preliminary information collection, planning, developing initial product, design validation and evaluation, product revisions, assessment and suggestions from language teachers and students, revisions, individual trials, revisions, small group trials, revisions, limited field trials, revisions until the product was valid and feasible to use; (2) The average percentage of all sub-components from the validation of design experts was 81% with the criteria "very good”. The average percentage of all indicators from the experts’ evaluation validation for the instrument in the form of description was 95.7%, for multiple choice instruments was 94%, and for psychomotor instruments was 86, 83%. All assessments from evaluation experts were in the criteria of "very good”. The teachers' responses to the assessment instrument had a total percentage of an average of 88% with the criteria "very good”. The students’ responses were declared feasible and met the needs with overall criteria “very good”; and (3) The effectiveness of the authentic assessment instrument of HOTS-based exposition texts obtained an average of 81.2 %. It could be concluded that students' abilities rose significantly and reached the Minimum Completion Criteria as expected