I love mnemonics! They help me remember things and more importantly they are a tool which helps me communicate complex ideas to others. A new publication, SAMHSA's Concept of Trauma and Guidance for a Trauma Informed Approach, includes two useful ways that will be helpful to me in simplifying complex concepts when I talk about trauma and trauma informed care. The first is the "The three E's of Trauma: Events, Experiences and Effects." The second is the "The four R's: Key Assumptions in a Trauma Informed Approach - Realization, Recognize, Respond, Resist Re-traumatization.