macrosystem -- implement laws > NCLB, which mandates safe schools, fund preventative programs; exosystem -- businesses can support schools > rebuild impoverished communities, role models, offer opportunities for field trips, guest speakers, fund after-school activities; mesosystem -- link between schools & families > empower families to share responsibility for creating a safe school environment, link between communities & families > provide services to support families ; microsystem -- implement a curricular priority of anger management & conflict resolution, classes for parents, teacher training.