Bullying is an act of oppression that is carried out intentionally and repeatedly with the aim of hurting another person. Bullying can occur physically, verbally, or in subtle ways such as forcing or manipulating. Bullying can have a negative impact on victims, perpetrators and witnesses. Victims can experience psychological stress, behavioral changes and trauma. There are several reasons why someone does bullying, namely because they see their parents often fighting. Unhealthy parenting patterns, too liberated, too harsh, or lacking love and attention. This community service activity aims to provide education regarding the negative impacts of bullying and maintain the mental health of children in Mojowono village, Kemlagi subdistrict, Mojokerto regency. The target of this community service activity is 111 elementary school children from grades 1 to 6 using the hybrid learning method. The results of the evaluation of children's understanding of the material showed that 85% of children really understood the material presented

PT Pionerbeton Indiustri is one of the companies engaged in the production of ready mix concrete, which is a subsidiary of PT Indocement Tunggal Perkasa, Tbk for casting projects located in JL. Ahmad yani (South Ringroad), Padukuhan Modalan RT 02, Banguntapan Village, Banguntapan District, Bantul Regency DIY. The method used in the study was to use the OMAX (Objective Matrix) method. This research was conducted for 12 months, namely January-December 2021. This research was conducted using the OMEX (Objecktive Matrix) method, so that in processing the data is carried out by following the steps of OMAX (Objecktive Matrix). The purpose of this study is to determine the ratios that most affect the rise and fall of productivity levels with the Objecktive Matrix method. Based on calculations using the Objecktive Matrix method, it shows that the productivity data of PT Pionirbeton Industri has a low value in September material, which is 471,134,817 due to the late supply of raw materials which results in decreased productivity in September.