systems , methods and devices for trauma assessment and tourniquet , cricoids cartilage and tension pneumothorax training including use of modular arms , legs and torso parts , that each include self - contained simulators having realistic symptoms of bleeding , pulse rates , smells and the like so that students can be trained to both assess patient trauma and train students to control bleeding through tourniquets . also the use of digital communication devices for presenting educational content and controlling the operations of the modular system parts for training purposes . devices and methods of teaching cricothyrotomy techniques through reusable neck collars having segmented fluid filled chambers , adjustable trachea tools with moveable parts , as well as enhanced teaching and recording the teaching results from multiple students .