Transformation geometry is one of the subjects in the curriculum structure of the Muhammadiyah Kotabumi University Mathematics Education Study Program taught in semester 4. One of the goals of learning transformation geometry is for students to comprehend transformation geometry in depth and be able to formulate concepts in a problem. Of course, to achieve this goal many problems are faced. This article seeks to conduct an objective descriptive analysis of the problems in building students' understanding of the geometry of transformation concepts based on the teaching experience of transformation geometry courses. Next we will try to find a strategy to overcome all problems in building understanding of the concept of transformation geometry.

Facing the era of disruption that is happening right now, learning done for students must lead to the development of higher-order thinking skills. This abilityis one of the provisions for participants to face competition in the future. Mathematical creative thinking ability is one of the higher order thinking abilities in mathematical ability.

This study aims to improve economic learning activities and outcomes using the Jigsaw learning model on international economic cooperation material for class XII IPS 3 students of SMA Negeri 3 Kotabumi in the 2018-2019 academic year. This research is a classroom action research, which was conducted to students of class XII IPS 3 of SMAN 3 kotabumi in the 2018-2019 academic year. In this study tested the use of Jigsaw learning models on international economic cooperation material to determine its effect on student learning outcomes. The study was divided into 2 cycles, namely for the material of cooperation between countries in the economic field and the multilateral economic cooperation body. Data collection techniques with cognitive tests and student attitude questionnaires obtained from each cycle, the results were analyzed whether there was an increase in each cycle. The results of this study indicate that, the use of Jigsaw learning models on international economic cooperation material can improve student learning outcomes in class XII IPS 3. Student learning outcomes have increased by 58% from cycle I to cycle II, while student activity based on questionnaires has increased in cycle II where students, more disciplined, cooperative, polite and tolerant in learning. Thus the use of Jigsaw learning models in the material of international economic cooperation can improve the economic learning outcomes of students of class XII IPS 3 at SMAN 3 Kotabumi in the academic year 2018-2019.

This research was aimed to investigate the influence of implementation collaborative learning with ispring presenter toward linear programing outcomes. This research was quantitative research. This also used the pre-experimental design with one-group pretest-posttest design. The sample were all students of the 4th of mathematic departement of Universitas Muhammadiyah Kotabumi in academic year 2017/2018. The sample was taken using purposive sampling. The instruments used was linear programing outcomes test. The conclusions of this research was that there is positive influence of implementation collaborative learning with ispring presenter toward linear programing outcomes.