This study aimed to examine the grammar teaching practices of primary school in southern Sweden in the context of Spanish as a Foreign Language (SFL). The goal was to explore the theoretical approaches guiding their grammar instruction, the teaching strategies they employ, and the practical challenges they face in their teaching. The research adopted an exploratory, qualitative methodological approach and was conducted with two professionally licensed teachers. Data were collected through two classroom observations of each teacher and supplemented with semi-estructured interviews to gather information on both actual teaching practices and the teacher´s perceptions. The data were then analyzed thematically to answer the research question and objectives. The results show that both teachers combine inductive and deductive methods in their grammar instruction, integrating it into communicative and contextualized activities, which aligns with current theoretical perspectives and the guidelines of the Swedish curriculum. However, differences were observed in their teaching strategies: while one teacher organizes instructions around thematic units that integrate brief explanations, exercises, and short assessments, the other breaks down the content into smaller components and follows a more traditional sequence of explanation followed by practice. Furthermore, the study also reveals several challenges that influence grammar teaching in Spanish as a Foreign Language (SFL), including a lack of pedagogical continuity, student heterogeneity, and limited time for lesson planning. In conclusion, the results undersore the importance of strengthening the structural conditions of modern language teaching and teacher training in order to foster practices that are more coherent and sustainable with the approaches promoted by the Swedish curriculum.