The goal to be achieved in this study is to determine the effectiveness of the implementation of the case method (case-solving-based learning) in terms of students' collaborative abilities. This type of research is a quasi-experimental study with the research subjects used as many as 29 PGSD students at the University of Mataram. The instrument of this research used a questionnaire on student collaborative abilities totaling 25 statements with a Likert scale of 1 to 4. The questionnaire was given to students twice, namely before and after learning using the case method. The data analysis technique in this study is the normality test as a prerequisite test, the t-test to determine the difference in the average pretest and posttest collaborative questionnaires, and the N-Gain score test to conclude. The results of this study indicate that the implementation of the case method is effective in terms of students' collaborative abilities.Keywords: case method, collaborative ability.

This study aims to describe the effectiveness of the case method in terms of students' critical thinking skills. This type of research is a quasy experiment with a one-group pretest-posttest design. The population of this study was all students of the Elementary School Teacher Education Study Program (PGSD) at the University of Mataram. The sample used in this study were 29 semesters 2 students taking elementary school mathematics education courses. Data collection techniques using test and non-test techniques. The instrument for collecting data uses a critical thinking ability test. The analysis technique uses the normality test for the prerequisite test, the t-test to find out the difference in the pretest and posttest averages, and the N-Gain score test to determine the effectiveness of the case method. The results showed that the results of the pretest and posttest of students' critical thinking skills obtained successive significance scores of 0.088 > 0.05 and 0.094 > 0.05 meaning that the data was normally distributed. Furthermore, the statistical results of the t-test showed a significance value of 0.000 <0.05. This means that there is a significant difference in average between the pretest and posttest. While the result of the N-Gain score is 0.713 and is in the high category, it can be said that the implementation of the case method has a high level of effectiveness on students' critical thinking skills.

Harmony in the life of the state, society and family really needs to be nurtured and preserved from an early age. Harmony is not only in religion, but in all things in life. Considering that the Indonesian state consists of many religions (six religions and belief systems), many islands, many customs, many languages and many tribes in it. Harmony is a peaceful and peaceful life in living a social life of mutual tolerance between people with one another, both of the same religion or different religions, so as to create harmony in life. The purpose of this study is to describe the implementation of Tri Hita Kirana in the world of work, education and socio-cultural society. Meta-synthesis as a qualitative systematic review method with a meta-aggregation approach is the method of choice for this research. There are ten Tri Hita Karana articles reviewed. Tri Hita Karana as a philosophy of view of life that can be used as a philosophical foundation for living in harmony, creating a harmonious relationship with God, harmonious human-human relations, and human-human relations with the universe. If harmony has been created starting from the smallest scope, namely family, society and country, then tolerance and harmony in life will create happiness on earth. Tri Hita Karana can be implemented in the world of work, education and socio-cultural.