In the Group Ethical Planned Change Assignment, you are asked to find and describe a case study. You'll find these in many books on social work, including your course textbooks.
Look for something like this*:
A case study describes a specific situation, providing names, history, and details important to a social worker. They're used as examples for you to practice your skills.
*This case study comes from an e-book in our library catalogue:
Spray, C., & Jowett, B. (2012). Working with children and their families. In Social Work in Action series: Social work practice with children and families. (pp. 38-58). London: SAGE Publications Ltd. doi: http://dx.doi.org.cat1.lib.trentu.ca:8080/10.4135/9781446288993.n3.