Nursing Certifications Online provides the necessary training and skill set to prepare students for employment and certification in entry positions as a home health aide (HHA) and Certified nurse assistant (CNA) in any state. Your online nursing course is available 24/7 anywhere with an internet connection. At the end of your training with NCO you will have the knowledge necessary to be a successful CNA or HHA. More home care agency's and nursing homes use our nursing courses than any other online course. This is why we have been around for 10 years!