http://moldingminds.com/video-introduction-to-the-bar-model/ A bar model -- also known as a bar diagram, strip diagram, strip model, tape method, tape diagram, Singapore method, etc. -- is a way to visually organize data for math problem solving. You can use a bar model to help you visualize and solve almost every kind of arithmetic problem. This video helps explain bar models and strip diagrams for elementary students (and teachers) studying problem solving and arithmetic.