Final answer:
According to Erikson's theory, the nursing student visiting the third-grade class and observing growth and development would fall into the stage of Industry versus inferiority.
Step-by-step explanation:
According to Erikson's theory, the nursing student visiting the third-grade class and observing growth and development would fall into the stage of Industry versus inferiority. In this stage, children are learning to think logically and classify objects and ideas. They are motivated to succeed and are developing a sense of competence and purpose.