In most interior design programs, you will take a professional practice class. Here, you'll learn everything you need to know to practice as a working interior designer. Learn how to market your interior design services. Get education on the business aspects of the client and contractor relationship. In a professional practice class, you'll see how an interior design firm is run and organized. Gain valuable insight on the tools you need to manage an interior design project. You'll also get the basic knowledge you need to start and run your own interior design firm.