1992: On October 3, 1992, he married Michelle Robinson, an American lawyer who had worked as his adviser at the Chicago law firm for three months. From April to October 1992, he directed the Illinois' Project Vote and worked towards the registration of 150,000 out of 40,000 unregistered African-Americans in the state. During this very year, Obama began teaching constitutional law at the University of Chicago Law School. He served as a lecturer from 1992 to 1996, and as a senior lecturer till 2004.