High Order Thinking Skill or Higher Order Thinking Ability is one of the abilities that is the goal in learning mathematics. Students are said to have High Order Thinking Skills (HOTS) if they fulfill three aspects, namely analyzing, evaluating, and creating. It is necessary to get used to it from an early age, through various models, strategies, or learning approaches. There are several studies that have tested the effect of learning models, approaches, or learning strategies including through the application of Problem Based Learning, Web-Based Project Based Learning, scientific approaches and Problem Solving. The purpose of this study was to analyze the impact of learning models and approaches on HOTS. This study uses a meta-analysis method with a sample of 5 articles from national journals and in the form of a coding category instrument. This study proves that the effect of methods, models and approaches on HOTS, HOTS is more influenced by the Problem Solving learning method.

This research is based on the problems that exist in schools namely the lack of student  interest  in  learning  mathematics  and  this  requires  an  innovation  of learning media used in schools during the teaching and learning process. This study aims to produce quality instrument validation that will be used in assessing mathematics learning videos based on the wondershare filmora software. This development research uses the Plomp model. The Plomp model consists of 3 stages, preliminary research, prototyping stage and assessment stage. The subjects of this research are 3 expert validators who are competent in their respective fields. This study uses instrument validity, practicality and effectiveness. The research data were collected using observation sheets, interviews and questionnaires. The data analysis techniques used are preliminary data analysis, data validity analysis, data practicality analysis, and data effectiveness analysis. the results of the assessment sheet of interview questions, observations and questionnaires using instrument validation state that these three things are in the very valid category, so that interviews, observations and questionnaires have been used to obtain data and information on the study.