This study aims to describe the ability of students to think logically on probability subject in class IX in SMP Negeri 1 Takengon. This study uses a qualitative approach to the type of descriptive research. The subject of this study consisted of three students, with the criteria of one student with high ability, one with moderate ability, and one with low ability. Data collection used tests and semi-structured interviews. The instrument used was a test of probabality material. The process of data analysis in this study includes data reduction, data presentation, and drawing conclusions. Based on the analysis of the description of students logical thinking abilities with high criteria (student 1) showed excellent logical thinking skills. Then students with moderate abilities (student 2) showed good logical thinking skills. Student 2 has a deficiency in the stage of thought twitching. While students with low criteria (student 3) demonstrate sufficient logical thinking skills. Student 3 has a deficiency in the stage of thought twitching and drawing conclusions that indicate the student's inaccuracy. Overall the ability to think logically these three students can be said to be good. This can be seen from every work and interview results,, students are able to do most of the indicators of logical thinking ability.

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A recent development in science and technology encourages teachers to apply technological information to deal with their duties and obligations of their professional development. The teachers are expected to apply the demands and responsibilities in their learning process. Learning by using interactive media is a solution to answer the recent challenges. This research aims to develop interactive media based on Anchored Instruction to support teacher learning. This study employed a 4-D research design consisting of 4 stages, namely: Define, Design, Develop, and Disseminate. Ten mathematics teachers selected with purposive sampling technique were involved in this study. Data collection comprises questionnaires and observation form. Data was analysed by using research and development procedures and triangulation techniques of data sourced from teacher contents on CoRe sheets, percentage data from student questionnaires, and percentage data from the school principal’s supervision sheet. This development research produced valid learning tools related to Anchored Instruction as valid media to be used in public high schools in Central Aceh. This study also found that Anchored Instruction learning model could help mathematics teachers in improving PCK’s in Geometry subject.

This research was conducted to look at the increase in mathematical communication towards cooperative learning type Course Review Horay assisted PowerPoint in the seventh grade of  SMP Negeri 1 Takengon. This research used Experiment Research with Quantitative research. SMP Negeri 1 Takengon was the population of research. Two classes were determined by purposive random sampling for the sample of research, called experimental class and control class. The experimental class was taught by using a cooperative learning type Course Review Horay assisted PowerPoint while the control class was taught by STAD. The conclusion was that by using a learning model Course Review Horay, the students more active because it can be suggested with the peers and its language. Things can improve the ability of mathematical communication students. Along with the development of their understanding of the material has been taught students to do math activities that encourage the application of mathematical communication ability.