Principle is defined as a guide to action, in our case as a guide to teaching. Methods of teaching foreign language are based on the fundamental principles of pedagogic (didactics). The seven didactic principles (consciousness, activness, visuality, consecutiveness, systematicness, accessibility, and durability) are interdependent and mutually complementary. In each subject those principles are applied specifically. For instance, the principle of visuality is differently realized in the teaching of mathematics, geography and foreign languages. different visual aids are used in teaching different subjects, and the purposes of their use vary.