Work at the very beginning explains the importance of language and linguistic expression in elementary education with a special focus on the regional and functional stratification of the Croatian language. It then provides an insight into how the Croatian national curriculum recognizes the place of dialect. The second part of the work presents the speech of the Pregrada region and its basic features. It explains the phenomena of dialects and vernaculars, spoken language, and standard language, as well as their roles in communication. The work showcases the basic characteristics of the Kajkavian dialect and the speech of the Pregrada region. Mijo Lončarić has combined the most important characteristics of the Kajkavian dialect, its specificities, vocabulary, and historical development, which are presented in the work. The susceptibility of the Kajkavian dialect to changes and its convergence with the standard language and the Štokavian dialect are mentioned, due to social changes and the influence of the standard Croatian language, primarily through education in schools and the media. The work also mentions the not uncommon occurrence of suppression of Kajkavian speech by Kajkavian speakers themselves, and provides possible reasons for it, as well as the need to strengthen awareness of the equal value of every linguistic idiom. In the end, a project on the topic of the speech and linguistic heritage of the Pregrada region is presented. The aim of the work, as well as the project conducted in classroom teaching, is to preserve the speech and linguistic heritage of the Pregrada region. The goal of the project was to familiarize students with the beauty of the linguistic treasure possessed by the Pregrada region, to encourage students to care for the preservation of the authentic speech and customs in the Kajkavian dialect. Through various activities in project-based teaching, students explored the Kajkavian dialect, got to know the speech of the Pregrada region through native speakers in a film, played traditional Kajkavian games, and as the final result of the project, created a Small Kajkavian Dictionary of the Pregrada region and filmed scenes from the lives of people from Zagorje. At the end of the project, a survey was conducted, which shows that students are extremely satisfied with getting to know the linguistic heritage and that they would like more educational content related to the linguistic heritage, laying the foundation for promoting the exploration of Croatian dialects in classroom teaching. Although known to fewer and fewer people the speech of the Pregrada region and other Kajkavian dialects are worthy of research and preservation.