This thesis deals with the argument, as the element of the spoken language, whose goal is promotion of the development of communication skills in the teaching of the Croatian language, in the younger grades of elementary school. The communication skill itself, as well as the other skills must be practiced. Therefore, it is necessary to provide more activities with students that would encourage the development of the previously mentioned skills. Accordingly, the aim of this thesis is to present the crucial role of the development of the communication skills of the students, and the discussion as one of the methods of implementing the development. In the master thesis, the discussion is represented as a part of teaching the spoken language, as a spoken exercise, and as an instrument for practicing the development of the communication components. Furthermore, the aim is to provide the representation of the arguments in the books as a teaching unit and as a methodological instruments. The research will display the discussion within the national framework curriculum of the Republic of Croatia, but also other countries such as England and Australia. Also, the survey provides information about the representation of the discussions as a teaching unit and as methodological instruments in twelve textbooks and workbooks within the area of the language and the spoken language. The research includes two of the three sets of books the major publishers in Croatia, for the third and fourth grade elementary schools. The practical part of the thesis provides models for teaching units of learning discussions as a teaching units, training and repetition of the same. Also, this includes models of teaching units in the instruction of spoken language, and implementation of the argument as the metodological instrument within the teaching of literature and media culture.