To find cases for this assignment, I recommend searching in LexisNexis, a database provided by the library (see link below). To search for a case in LexisNexis, use the "look up a legal case" search tool on the LexisNexis home page:
If you have a particular case in mind, you can search for it by citation number or by the parties involved. If you don't have a particular case in mind (or don't know its specific information) you can search by keyword instead.
A guide to the common sections in case documents in LexisNexis is available here.
You can also search for state and federal codes in Westlaw or LexisNexis.
In Westlaw, select the appropriate option under Statues and Regulations on the main search page:
In LexisNexis, click on Federal or State Statutes, Codes and Regulations under US Legal in the sidebar: