The article outlines the pathways for integrating STEM disciplines into the planning of Ukrainian language and literature lessons in secondary education institutions within the framework of the New Ukrainian School. It substantiates the growing need for interdisciplinary approaches that foster the development of core competencies while considering the advantages, potential risks, and limitations of the proposed methods. The emphasis is placed on the importance of combining humanities with natural and mathematical sciences to enhance students' understanding of a holistic worldview, illustrating the need to avoid focusing solely on one aspect of development (so-called «humanitarians» and «technocrats»). The article offers theoretical and practical recommendations for developing STEM projects that engage students in creative literary exploration through applying scientific principles and doctrines. The effective combination of STEM education principles with the field of philology enables the creation of a dynamic and effective educational environment where students perceive the interconnectedness of knowledge, develop a well-rounded intellect, and receive foundational preparation for higher education. Methods of linguistic analysis of scientific texts are discussed, demonstrating how language skills can be enhanced through scientific discourse. To illustrate the material, approximate schemes for planning integrated lessons with specific examples from both linguistic-literary and scientific perspectives are provided. To improve understanding and engagement of modern students, emphasis is placed on using digital tools and platforms that ensure integration, including online resources, interactive modeling, multimedia content and artificial intelligence. The necessity for alignment among educators of various disciplines is evident to ensure a fair assessment of proficiency in the state language and scientific literacy, which is a crucial issue during wartime when language matters become increasingly prominent, alongside scientific and mathematical literacy, for building an intellectually developed country.