In order to become certified as a CNA, prospective nurses need to follow a series of simple steps. There are four steps to become a Certified Nursing Assistant (CNA), starting with the completion of a high school diploma or a GED. This is followed by the completion of a CNA program approved by the state. These programs are offered by a variety of hospitals and Red Cross Technician Schools, in addition to community colleges and vocational schools. After this, students will have to complete their clinical training hours, followed by passing the state-approved exam that tests competency. Students will then be listed on their state’s CNA registry.