<strong>Analysis of Argumentation in Socio-Scientific Issues of junior High School Students.</strong> The 21st Century Education focuses on the development of the competence in creativity, critical-thinking, communication, and collaboration. Based on that reason, the argumentation can be one of the solutions to answer this issue since it facilitates the critical-thinking and communication competences. Arguments can be used in socio-scientific issues that present open problems and debatable. The aims of research is to find out the quality of the argumentation on the socio-scientific issue through the plastic theme of the topic of pollution. Argumentation analysis using TAP (Toulmin's Argument Pattern) consisting of 6 components, namely claims, data, warrant, backing, qualifier, and rebuttals. Based on the results of the research, it was found that the quality of the argumentation in the socio-scientific issues of junior high school students was still low. The low quality of argumentation is caused by the poor of students' concept understanding.

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This research was funded by BOPTN funding. This research is focused on the Development of Basic Volleyball Learning Media Based on Web Learning Materials Towards KKNI at Fik Medan State University. This research is a research and development. After researching the results of volleyball basic technical skills based on learning groups, namely the posttest experimental group (new model, web learning) and the pretest experimental group (old model), it is found that the results of basic ball technical skills volleyball in the posttest experimental group ie the lowest score of 80 and the highest score of 90. Whereas in the pretest experimental group, the results of volleyball basic technique ability obtained the lowest score of 70 and the highest score of  90. The average score and standard deviation in the posttest experimental group were 82.00 and 4.14, while in the pretest experimental group amounted to 78.00 and 8.62. When viewed from the distribution of questionnaires to see new model learning is more effective than old model learning. The average effectiveness of the old model learning outcomes indicator is 86.57% and the learning model is new or uses web learning 98.77%. So it can be concluded that learning new models is more effective than learning models.

This study discusses how students' learning attitudes develop in a positive direction through role-playing technique group guidance services. The aim of the study was to see whether or not the role playing technique group guidance service was significant to changes in student learning attitudes from the aspect of students' views of teachers (teacher approval/ta). The research method used is the experimental method, namely research that aims to see changes in students' learning attitudes in terms of the aspects of students' views of the teacher (teacher approval/ta ) with group guidance services using role playing techniques. The type of design used in this research is a Quasi-Experimental design with one group pretest-posttest design. The topics discussed in the role-playing technique group guidance service are viewed from the perspective of students' views of teachers. The results of the study indicate that there are significant changes in students' learning attitudes towards a better direction.