The aim of the research is to find out the meaning of the fangasi ritual as a traditional ceremony after the death of the Nias tribe in Ononazara village, Tugala Oyo subdistrict, North Nias district. The research method used in this research is descriptive qualitative research about the meaning of the fangasi ritual as a traditional ceremony after the death of the Nias tribe in Ononazara village, Tugala Oyo subdistrict, North Nias district. The result of this research is that the meaning of the fangasi ritual is the highest form of respect that the Nias tribe has for every person's life. The meaning of the fangasi ritual in Ononazara village is the last event for the person who has died. The fangasi ritual is carried out depending on its position in custom and also as a form of a child's obligation to his parents who have died with the aim of paying off the debts of his parents or the person who died while he was alive in the world. It can be concluded that the meaning of the fangasi ritual is a traditional ceremony implemented in the village of Ononazara, which is passed down from generation to generation, which aims to resolve the burden on the family of the deceased as a sign of final respect, and so that the spirits of the deceased will rest in peace.

Sunday school learning which initially used the lecture method, now there are various churches that use various teaching methods, one of which is audio-visual media. The problem, according to the author's observations, especially at the Fellowship Protestant Church (GPP) Parhorboan Resort Tapanuli Utara II, is that school teachers are still lacking in using teaching methods that can create interaction between teachers and children, thus having an impact on children's interest in participating in Sunday school worship. The research method used in this research is a descriptive qualitative method. The research implementation uses procedures that produce descriptive data in the form of written and spoken words from people whose behavior is observed through interviews or observations using a qualitative approach. This research aims to find out how to increase the interest of Sunday school children aged 9-12 years in attending Sunday services at the Fellowship Protestant Church (GPP) Parhorboan Resort Tapanuli Utara II through the use of audio-visual media. The results of this research show that Sunday school children receiving teaching delivered by Sunday school teachers using audio-visual media can increase Sunday school children's interest in attending worship.