Development of HOTS-Based Student Activity Sheet with an Open Ended Approach to Improve Mathematical Metacognition Ability and Self Confidence of Students of 20 Medan Junior High School

This study aims to describe: 1) how the quality of HOTS-based student activity sheet with an Open Ended
approach is quality; 2) increasing students' mathematical metacognition skills through HOTS-based worksheets
with an Open Ended approach; and 3) increasing students' self confidence through HOTS-based worksheets with
an Open Ended approach. This research is a development research. This research was conducted in two stages,
namely the first stage of developing HOTS-based worksheets with an Open Ended approach using a formative
evaluation type Tessmer development model, and the second stage testing HOTS-based worksheets with an
Open Ended approach which was developed in class VIII-1 and VIII-3 SMP. State 20 Medan. From the results
of trial I and trial II, it was obtained: 1) HOTS-based worksheets with an Open Ended approach to improve
students' mathematical metacognition and self confidence skills that have been developed have met the valid,
practical and effective criteria; 2) Increasing the ability of mathematical metacognition using HOTS-based
worksheets with the Open Ended approach which has been developed as seen from the N-gain value in the first
trial of 0.43 which increased to 0.47 in the second trial, meaning that it is in the "moderate" category; and 3) The
increase in students' self confidence with the Open Ended approach which has been developed as seen from the
N-gain value in the first trial of 0.46 increased to 0.51 in the second trial, meaning that it is in the "medium"
category.