This research aimed to develop high order thinking skills  workheet in momentum, impulse, and collision topic for senior high school This type of research is Research and Development  follow 4D models, includes : define, design, develop and disseminate. Data collection instruments used validation sheets for given to 5 validator, Aspects assessed include graphic, presentation, language, and the contents of workheet. Based on the result of data analysis showed that all aspects got average score in the range of 3.4 to 4 with categories of  very high. Thus, high order thinking skills was valid. For the purposes of testing the worksheet is given on 68 students. to measure the effectiveness of worksheet used  Higher Level Thinking Ability Test that amounts to 12 items. Based on the result of data analysis indicate, There is difference of higher order thinking skill of students who use HOTS worksheet than who are not use HOTS worksheet, where the average Higher Order Thinking Skill on students who use HOTS worksheet higher

This study aims to determine the ability of students’ metacognition in solving abstract problems in physical material. The study involved students who took through the test. Metacognition ability data obtained through written test consisting of questions metacognitive knowledge and metacognition skills. Data analysis is done descriptively. The result of the research shows that declarative knowledge dominates students metacognition knowledge, that is students can recognize the difficult problem and able to interpret in other forms but less able to recognize method used and how to finish, while students' metacognition skills are more dominant in planning and monitoring fields. Prediction and evaluation skills are still relatively low. Overall, metacognition ability of students included in the low category.

Computational Thinking (CT) is the main skill of the 21st century that is increasingly attracting more researchers to study how to implement CT in the learning and teaching process. Among the CT tools that can be used to develop CT is programming. Currently, availability and easily accessible programming tools have led researchers and educators to explore how to introduce CT in the context of learning and teaching in schools. Recognizing the importance of implementing CT in the classroom, this study aims to develop the CT-S (Computational Thinking and Scratch) module for the Linear Motion topic. The type of this study is research and development research to develop modules based on the ADDIE model to produce the CT-S module with validity and reliability. Data were analyzed using descriptive statistical analysis. The result showed that the CT-S module was valid. It is eligible to be used as the instructional material of Physics. This study implies that computational thinking skills can be integrated with other subjects besides computer science like physics. Therefore, teachers can design lessons that are relevant to the context and students' characteristics.

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