What is a bar model?

A bar model is a visual representation of a mathematical concept using bars or rectangles to represent quantities or numbers. Bar models are often used in problem solving to help students visualize and understand the relationships between different quantities or parts of a whole. They are commonly used in elementary and middle school mathematics to represent addition, subtraction, multiplication, and division problems. Bar models can also be used to solve complex word problems by breaking down the information into visual segments. They can be a helpful tool for students to develop their problem-solving skills and improve their understanding of mathematical concepts.