One of the best ways to learn how to write a business plan is to learn by doing. This course is for six teams of five students each that want to write a business plan for their own real new start-up company. Entrepreneurs should be flexible thinkers and highly motivated, with a large capacity for work. They must be persistent and able to thrive in an unstructured environment. Entrepreneurs should be confident self-starters with the ability to take the initiative, overcome obstacles, make things happen and get things done. Students enter their plans in the Yale Venture Challenge Business Plan Contest sponsored by the Yale Entrepreneurial Society. The scope of the work includes doing in-depth market, product, and competitor research; creating a strategy for a sustainable business; and writing and presenting a professional-quality plan (including a financial model and deal structure).