Textbooks are a basic medium of teaching. They are linked to the educational area of the curriculum, with the content and performance standard individual subjects and allow students to develop key competences; development of specific subject competences, competences and skills.
They are considered to be parts of their processing and character a wide range of different texts of scientific disciplines, which transform relevant teaching subjects in secondary schools.
With a change in philosophy of education and the formation of the State educational programmes have also started to create modern material didactical agents textbooks, workbooks and textbooks.