Our exclusive Certification program is taught in an easy, informative and concise manner through the use of ONLINE education or our Direct Workbook correspondence program. Teachings include: Function of Interior Spaces, History of Furniture, Trade Showrooms, Use of Color, Lighting, Scale and How to Charge for your services as a Certified Interior Decorator. C.I.D. is also the only organization that can educate, test, and certify Interior Decorators.