When you enroll for classes that train you to become a certified nurse, there is one thing you got to keep in mind – This is not going to be a weekly or a monthly affair. At best, aCNA Class will normally run for a duration of about 6 months. Now, during these 6 months, you would be trained on how best you could perform your duties as a nurse. Thus, for the next half a year, you have to be on your toes in your learning and training. The best you do here will really help you with your stay as a nurse with the healthcare setting.