Trauma Informed Experiential and Reasoning Skills (TIERS) is focused on trauma-informed care. CAST first sought to understand the work environments of police, teachers, social workers, etc. They then developed a curriculum – first taught at UMSL, then shared as part of their work across the nation – helping professionals whose jobs require them to interact with people of all ages who have experienced trauma of some type. CAST has trained hundreds of professionals and delivered the curriculum to more than 40 other institutions. The faculty involved have gained new insights in how the average person reacts to very challenging situations – especially involving children. The professionals who receive the training have new skills to use in a stressful time which they did not previously have. And, with the curriculum now in over 40 institutions, many more pre-professionals will be trained in how to have a trauma-informed approach when working with victims and their families.