; (ii) selective prevention, through the reduction in the likelihood of at risk students developing social, emotional, mental, behavioral health problems, suicide, or substance use disorders; (iii) the screening for, and early identification of, social, emotional, mental, behavioral problems, suicide risk, or substance use disorders and the provision of early intervention services; (iv) the treatment or referral for treatment of students with existing social, emotional, mental, behavioral health problems, or substance use disorders; (v) the development and implementation of evidence-based programs to assist children who are experiencing or have been exposed to trauma and violence, including program curricula, school supports, and after-school programs; and (vi) the development and implementation of evidence-based programs to assist children who are grieving, which may include training for school personnel on the impact of trauma and bereavement on children, and services to provide support to grieving children. (C) The comprehensive school-based mental health program carried out under this section will provide for in-service training of all school personnel, including ancillary staff and volunteers, in— (i) the techniques and supports needed to promote early identification of children with trauma histories, children who are grieving, and children with a mental health disorder or at risk of developing a mental health disorder, or who are at risk of suicide; (ii) the use of referral mechanisms that effectively link such children to appropriate prevention, treatment, and intervention services in the school and in the community and to follow-up when services are not available; (iii) strategies that promote a school-wide positive environment, including strategies to prevent bullying, which includes cyber-bullying; (iv) strategies for promoting the social, emotional, mental, and behavioral health of all students