A teacher training course entitled "Classroom and Individual Emotional and Behavioral Supports" ("CIEBS") includes four modules: School-wide Positive Behaviour Supports (SWPBS), Trust-based Relational Intervention (TBRI), Non- violent Crisis Intervention (NCI), and practicum experience. The present article describes the rationale for selecting each of these modules, the activities included in each module, and a mixed-methods evaluation of the course's influence on its participants. Group-wide quantitative measures showed growth in the efficacy for classroom management and preparedness for dealing with students' stress among the treatment group, with little observable change among control participants. Through pre-/post-course vignette responses, individual interviews, and focus group interviews, participants reported that the course helped them to become better prepared and more confident in their SEL abilities. The participants pointed to the neuroscience of complex trauma, as taught through the TBRI module, and active learning provided through NCI module as critical reasons for the course's effectiveness.