Abstract
The purpose of this study is to produce a valid, practical and effective Junior High School Mathematics worksheet based on the metacognition approach to improve students' HOTS. This research is a development research using Plomp model with three stages, namely the preliminary investigation, prototyping stage, and assessment phase. The instruments used were questionnaires and tests. The results of this study is metacognition-based worksheet which is a) valid from the aspect of content, construct, language, and graphic, b) practical from the aspect of usage, time and readability, and c) effective from the aspect of improving the HOTS ability of students.