He worked as a major professor in the classroom, as well as in the theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoretical, theoret