The purpose of this study was to determine the effect of the Think Pair Share learning model on the learning activity of Christian Religious Education and Character Education of class XI students of HKBP Doloksanggul Private High School in the 2024/2025 Academic Year. The research hypothesis is that there is an effect of the Think Pair Share learning model on the learning activity of Christian Religious Education and Character Education of class XI students of HKBP Doloksanggul Private High School in the 2024/2025 Academic Year. This research method is the Quasi Experimental Design method using the Nonequivalent Control Group Design. The population of all class XI students of HKBP Doloksanggul Private High School in the 2024/2025 Academic Year who are Protestant Christians is 159 students and is divided into 5 classes. The research sample was determined using a purposive sampling technique, namely 30 students in class XI-4 as an experimental class using the Think Pair Share learning model and 33 students in class XI-2 as a control class using the usual treatment (conventional class). The research instrument was a closed questionnaire consisting of 30 items. The research questionnaire data was analyzed using the average difference test formula (N-Gain Score). The average pretest and posttest scores at the first and second meetings of the experiment were 3.06 and 3.77, and for the first and second meetings of the pretest and posttest in the control class were 2.75 and 3.00. So the overall average score of the experimental class is 0.7570 in the high category. The overall average score for the control class is 0.1930 in the low category. Then the t-test obtained a value of t count = 14.170> t table (? = 0.05; df = 61) = 2.000, so H0 is rejected and Ha is accepted. The study concluded that there is an influence of the Think Pair Share learning model on the activeness of learning Christian Religious Education and Character Education of class XI students of HKBP Doloksanggul Private High School in the 2024/2025 Academic Year.

This research aims to determine the strategy for realizing social harmony in Islamic and Christian communities in Bukit Malintang District, Mandailing Natal Regency, knowing the forms and forms of social harmony and the efforts made to create social harmony in Islamic and Christian communities in Bukit Malintang District, Mandailing Regency. Christmas 2024. This research uses qualitative research methods. Data collection in this research uses observation, interviews and documentation techniques. Social harmony is compatibility, suitability, balance and justice which provides a sense of security, peace and prosperity to all mankind. Broadly speaking, it means the existence of brotherhood and togetherness between religious communities even though they are different in terms of ethnicity, race and class. The results of this research show that in the villages of Promisematogu and Lambou Dahlul Ihsan, each religion teaches to live in peace and tranquility. The importance of awareness among the adherents of each religion makes it very easy to establish social harmony in society. So that people can live in peace, help each other, respect each other, in everyday life. Religious figures also often emphasize the importance of tolerance as a basis for peaceful coexistence. By implementing the Dalihan Na Tolu system, the kinship system has an important meaning that looks at the relationship between Islamic and Christian communities in the kinship system incorporated in Dalian Na Tolu, overcoming relationships that are built on the basis of inter-religious brotherhood.