Today, skin health is the main focus for women and men who want healthy, well-groomed and clean facial skin. The use of chemicals and other external materials allows potential disease for facial skin health. Diseases caused on the face are quite diverse from small to medium scale. The problem that often occurs in the community is the lack of knowledge and limited sources of information about facial skin health causing people to tend to let the disease happen. Based on the problems that have been described previously, this expert system was created to help the public understand the symptoms of facial skin diseases experienced and solutions to overcome these diseases. In the development of this expert system using the forward chaining method as the inference engine and the certainty factor method to determine the diagnostic confidence value. In designing this expert system application the user can choose the symptoms of facial skin diseases, then the output produced is the level of confidence, the possibility of the disease experienced and an explanation of the solution for the initial treatment of the facial skin disease. From the test results based on the Black Box, the results obtained 100% functionality runs according to the list of system requirements. In the accuracy test, a very good accuracy value is obtained, which is 100% of the 10 existing sample data.

Penelitian ini bertujuan untuk mengetahui hubungan antara kecerdasan moral dan kesadaran moral terhadap perilaku bulliying siswa SMA sederajat di kabupaten Labuhanbatu tahun 2019. Penelitian ini menggunakan metode kuantitatif dengan jenis korelasi, adapun populasi dalam penelitian ini berjumlah 46 sekolah dengan jumlah siswa + 6.128 siswa, sedangkan sampel dalam penelitian ini menggunakan teknik Random sampling dengan menggunakan rumus slovin, sehingga di peroleh sampel dengan jumlah 364 siswa SMA sederajat. Instrumen dalam penelitian ini terdiri atas angket kecerdasan moral, kesadaran moral, serta perilaku bulliying siswa, berdasarkan olah data tersebut maka di peroleh kesimpulan bahwa kecerdasan moral dan kesadaran moral memiliki hubungan dengan perilaku bulliying.

The Human Development Index (HDI) can be increased in various ways, one of which is the community literacy improvement program. Literacy and literacy, cultural and civic literacy, numeracy literacy, financial literacy, digital literacy and scientific literacy are proven and highly effective in promoting the efforts to increase the Human Development Index. The six basic literacy are not only effectively applied to the world of formal education, but can be actualized in society in general. This study involved 56 communities representing each hamlet in one village determined by purposive sampling technique with certain criteria. The results of this study indicate that improving literacy, cultural and civic literacy, numeracy literacy, financial literacy, digital literacy and scientific literacy are proven to increase the Community Development Index. Improving literacy skills is carried out by providing various kinds of basic training according to community needs. The basic training provided can stimulate the community to be more concerned with developments in the surrounding environment.

One indicator that can be used as a success in the educational process is the value of students' mathematical literacy abilities. In Satu Atap Aek Natas Junior Secondary School out of 122 samples, the results of 87 students are still relatively low. Mathematical literacy is influenced by, among others, the interest in reading mathematics and low family social support. For this reason, the solution offered in the implementation of community service is to carry out learning activities using a recitation-assisted PMR approach, the application of the principle of economic tokens accompanied by the use of a contact book. Participants in the implementation of this service consisted of 30 students, 30 parents/guardians of students, and 15 teachers. Based on the results of the implementation of community service there is an increase in the average value of literacy skills, interest in reading and social support of the family before the implementation and after the implementation of service.

Along with the rapid development of Social Networking Sites (SNS), social media, recently, has become a lifestyle for many people around the world, including in Indonesia. The data in January 2018 showed that in Indonesia out of 132.7 million internet users, almost all (131 million), or up 23% from the data in 2017, were Facebook users with the dominance of 18-24 years old, 35% of whom were the highest active users. The rapid growth of Facebook users annually in Indonesia, especially in the age of students and college students, encourages researchers to conduct many empirical studies of Facebook use among students. There is a tendency for using Facebook continuously to create FAD effects (Facebook Addiction Disorder) among students and can affect the spirit of learning. This study also discusses what is the motivation for using Facebook and seeing the potential for FAD to occur. In this study, an online survey over 375 respondents from several students in Labuhanbatu District was conducted. To explore respondents' motives in using Facebook, respondents were given questions that were divided into the following five motives: social interaction, leisure time, entertainment, friends, and communication. While to look for potential addiction, respondents were given questions using the Bergen Facebook Addiction (BFAD) scale. In getting a connection between the motives for using Facebook and Facebook Addiction, the data was tested by analysis of variants (ANOVA) and partial tests using SPSS software. The results obtained were 65.8% of participants were at a moderate level, while 20.3% were at a low level, and only 13.9% of participants were at a high level. While the most significant motive affecting respondents in using Facebook is the motive to fill the time and motives for communicating