A marketing teacher teaches marketing courses at an educational institution. Your responsibilities in this career are to teach students the principles of the marketing industry, how to perform consumer research, and the general practices behind advertising and sales. Your duties vary depending on the level at which you teach, but generally, you need to prepare and present lectures and give assignments that teach and test your students. Some curriculum also requires practical examples and projects. Most marketing teacher positions are with colleges and universities, but many high schools have begun to offer marketing and business courses as well.