This paper tries to point out the importance of nurturing the native speech and tradition as well as implementing the principle of nativeness in the teaching of the Croatian language. It's about the most important idiom, the student's first speech, which is acquired spontaneously in the home environment. Since the traditional teaching was putting the students in a passive position until recently, the first part of the paper refers to the need to change established work methods in schools and make a shift towards independent learning through research. Likewise, modern methodical systems of educational work based on the students own activity are presented. In the second part of the paper, the importance of the coexistence of the native speech and the standard language are explained. In addition to that, pointed out is the necessity of paying more attention to the promotion of the principle of nativeness in the teaching of the Croatian language and greater motivation of students in order to develop interest in native contents, native history and own cultural heritage. Analyzing the responses to the survey, we gained insight into the representation and inclusion of the principle of nativeness in the teaching of the Croatian language from the teacher's point of view, as well as the use of the project as one of the most modern work methods in teaching, all that for the purpose of improving the teaching of the Croatian language. In conclusion, a methodical model of approach to the literary work of Vinko Kos was created as part of native teaching. When preparing the project, emphasis was placed on the independent and active participation of students in the realization of the project.