Students in mathemat ics learning activit ies must have mathematical co mmunication skills. They are using mathematical concepts to contextual problems so that understanding is more meaningful and links mathemat ics learning with other learning topics. Student worksheets are one of the teaching materials that summarize the material and study guides that are in accordance with the competencies. The purpose of this art icle is to develop the design of student worksheets to imp rove students' mathematical co mmunication in learning activit ies with an RM E approach. In its development, the ADDIE model was applied in this study, which consisted of four steps: first analysis, second design, third development, fourth implementation, and the fifth evaluation. The subjects of this study were students of Muhammad iyah 1 Yogyakarta Yogyakarta Vocational School. The instruments of data collection consist of interview guideline sheets, document sheets, and description sheets. Interview guideline sheets are used to obtain data in the curriculu m and character of students, and document sheets are used to evaluate teaching materials, and description sheets are used to determine the improvement of students' mathematical co mmunication. This data was analyzed using qualitative data analysis. This study resulted in the design of worksheets of students with RM E approach to imp rove students' mathematical communication skills.
Critical thinking skills are high-level thinking skills that support intellectual curiosity and give birth to answers that are creative and open. The industrial era of the 21st century 4.0 places great emphasis on critical thinking skills that make it easy for students to deal with a variety of problems. This study aims to design teaching materials in the form of student worksheets that contain activities in accordance with the steps of the problem-based learning model and indicators of critical thinking skills with the ultimate goal of increasing critical thinking skills. This study uses the ADDIE development method with five stages, namely: (1) Analysis, (2) Design, (3) Development, (4) implementation and (5) evaluation. The limit of this research is to analyze and design, the subjects in this study were students of class VII IT Luqman Al-Hakim International Yogyakarta. Data collection instruments include observation sheets, interview guidelines, and validation sheets. The results of the study concluded that the PBL-based student worksheets design to improve critical thinking skills was developed through the ADDIE development method with components: cover pages, preface, table of contents, concept maps, Core Competencies, basic competencies, basic indicators, student worksheets activities, evaluations, and summaries. Student worksheet has been validated by two validators and is categorized as feasible with some revisions that researchers have fixed. This research can be continued at the development and implementation stages.
Higher-Order Thinking Skills (HOTS) is one of the important skills that every student has to master it in the 21st century. Discovery learning is a learning model that can be used to train HOTS in the learning process. The purpose of this research is to develop HOTS-based student worksheets with a discovery learning model for trigonometry subjects in the tenth grade and to assess it based on the media assessment, material assessment, and the practical assessment. The subjects of this research are the researcher and some validators, while the objects of this research are 33 students, which consist of X IPA 1 students of SMA Negeri 1 Turi and X IPA students of SMA Islam 3 Sleman 2018/2019 academic year. The result shows that the criteria of the developed student worksheets are very feasible based on the media assessment, material assessment, and practical assessment. The developed student worksheets have an average score of 4.49 from three media validators, 4.39 from three material validators, and 4.33 from 33 students who become the respondent. It explains that the developed student worksheets can be used as an alternative student worksheet during the learning process in the class, which can train the student's HOTS.
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