Discover NAR’s Home for Exceptional Education The Center for REALTOR® Development (CRD) is devoted to lifelong learning, career advancement, and specialized credentials for real estate professionals. With 10+ designations and certifications, over 100 microcourses, learning pathways, an award-winning podcast, and educational events, there is a learning experience for every real estate professional. Sharpen your skills and boost your business by investing in yourself.