<human>:  How many years of schooling does a nurse need to have?
<bot>: A registered nurse needs to have a bachelor’s degree in nursing. This typically takes four years of college, and includes courses in biology, chemistry, and math. After completing the bachelor’s degree, nurses must complete a master’s degree in nursing, which typically takes two years of college. After completing the master’s degree, nurses must pass a national certification exam to become a registered nurse.