The objective of this study is to determine the effect of cognitive style on students’ mathematical problem-solving ability. This study used the survey method with a quantitative approach. One class consisting of 32 students was selected by purposive sampling for the study sample. A total of 17 students have a field-dependent (FD) cognitive style, while 15 other students have a field independent (FI) cognitive style. GEFT and mathematical problem-solving ability test instruments were used to collect research data.

The adequate learning resources as support for student learning activities was one of the factors supporting the learning process successful. The use of textbooks as a source of learning did not support thinking activities, especially students' mathematical reasoning abilities. The textbooks so far only emphasize the understanding of the concept while the students' mathematical reasoning abilities were less noticed. This research intends to develop student worksheets that are valid, practical and effective in developing mathematical reasoning abilities and can be accessed via the internet.

This study aims to identify students’ errors in solving problem equals to PISA’s based on Newman procedures. Qualitative-descriptive research was used in conducting this study and the subjects were third-grade students at SMP Unggul Sigli in year 2017/2018. Data was collected using tests and interviews. The instrument of this study was a sheet consisting of 5 (five) mathematical questions that composed equivalent to PISA’s problem.

Vocational Higher Education is a formal college providing knowledge as well as preparing the students for six months apprenticeship after five semesters of school. This study is based upon work that the researcher has done to investigate the contribution of this institution especially insurance administration and actuary seen from the student’s perspectives for apprenticeship to develop their skills. This study used qualitative data which were collected by interviewing the randomly chosen apprentices and are measured with the questionnaire.

This study aims to determine the process, specifications, and teacher's perception of developing a teacher guidance module in making mathematical assessment instruments based on mathematical problem-solving. This study uses the Research and Development method which is used to produce certain products, namely teacher guidance modules. The development model used in this study is the development model that Marshall et al. (2009), Tryon and Bishop et al (2012) and Rusdi (2018) combined by researchers into references.

This study discusses the correlation between students’ learning motivation and mathematics learning outcomes. The population of this study is 320 students of class XI MAN Model Makassar. The technique sampling used was random sampling. Data collected by using documentation format and questionnaire. Data analyzed by using descriptive analysis and nonparametric statistical analysis. The result of descriptive analysis showed that 53,75% of students had high learning motivation and 62,5% of students get scores 7-7,4 on 10 scales.

This study was conducted on junior high school students with the aim to improve the learning outcomes of mathematics, student activities, and student responses through the application of the STAD type cooperative learning model with guided discovery method. This type of research is Classroom Action Research, ie research done by teachers in their own class with planned, systematic to improve the quality of classroom learning practice.

Lack of innovative learning media that is interesting, practical and easy to use in learning such as listening to lesson modules or seeing powerpoint shows used by teachers, thus causing learning to be ineffective, unattractive, and slow to understand, this results in a lack of understanding of mathematical concepts. Because of this, researchers are trying to develop an interesting and interactive learning media.

The research is aimed to analyze students’ difficulties in studying calculus on inequality and limitfunction in Calculus subject. The research is qualitatively analyzed using descriptive data taken inacademic year of 2018/2019 at the University of Putra Indonesia YPTK, Padang. The subject of the research is53 students majoring in Computer System. The samples are 6 students grouped into 2 high-grade students, 2middle-grade students and 2 low-grade students. Each class taken has already represented the average scores.The research is done in February until April 2019.

Culture is a habit that contains essential and fundamental elements and also strongly related to human life and passed down from generation to generation. Culture can be used as a medium of learning for students at school as well as learn the culture itself. Mandailing is one of the tribes of North Sumatra that has a culture of customs, heritage, distinctive traditions, and different from other cultures that must be preserved.