Most civil rights law is based in constitutional law, which every law school teaches, so it's not as necessary to find a school with a particular strength in civil rights law as it would be were you interested in IP law or something specialized like that. However, Harvard has the Civil Rights Project, which does some amazing work and involves law students, and Berkeley now has its own Civil Right Project as well (since Christopher Edley, the co-founder of the Harvard project, is now the dean at Berkeley). For civil rights, the work you do outside of your classes (during the school year and your summers) is much more important than the classes you take during law school.
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