All law schools offer the same basic legal education. We all take the same courses in the first year of law school. By years 2 and 3, you can begin to customize your schedule and enroll in courses that interest you. If international law is your specific interest, it is very important that you attend a law school that has a heavy emphasis in international law. Although you cannot "specialize" in a particular law in law school, each law school has something special to offer its students. For example, Baylor is known for turning out great litigators. You will want to pick a law school that has a panache and program for international law, so that you can enroll in as many courses as possible, as well as find great connections with law firms that practice international law. There are a few great ones out there. Good luck with your search!