Password accounts for Westlaw and Lexis are limited to law affiliates (students, faculty, and staff), but the Law Library has a free public terminal for Westlaw located very close to the reference desk. In addition, all Harvard students have access to the academic version of Lexis Nexis, i.e. Lexis Nexis Academic.
See the Tip Sheet on Searching For Articles.
Topics for your class will be interdisciplinary in nature, so it's helpful to know about databases that include abstracts or other information on materials that include law but also include related fields, such as the three listed below. I call them the three sisters because at first glance, they all look alike. But, when you look closer, you can see that they have their differences.