Relevance. Modern higher education emphasizes not only professional training but also the integration of students into the global professional community through foreign language proficiency, which enhances skills and professional competence. Purpose. This research aims to assess the effectiveness of Content and Language Integrated Learning (CLIL) methodology in biological education programmes at higher education institutions in Kazakhstan. Methodology. A semi-formalized questionnaire survey was conducted across six educational institutions in Kazakhstan, comprising "closed" questions including open-ended list questions, single-choice questions using the Likert scale, and multiple-choice questions, totalling 16 questions. Results. The survey conducted across six educational institutions in Kazakhstan revealed that 85.5% of students perceive Content and Language Integrated Learning (CLIL) positively contributes to their English language acquisition within biological education programmes. This underscores CLIL's effectiveness in enhancing language skills alongside disciplinary knowledge. Despite varying English proficiency levels among participants, the study indicated strong student engagement with CLIL, demonstrating significant interest and active participation in the learning process. Conclusions. The study confirms CLIL's efficacy in enhancing English acquisition within Kazakhstan's biological education. With 85.5% of students noting its positive impact, CLIL shows promise as a key method for integrating language and disciplinary knowledge. Despite varying English levels, high student engagement underscores CLIL's effectiveness. Future steps should focus on formalizing CLIL across Kazakhstan, providing support for educators, and refining methodologies through ongoing research. Implementing CLIL prepares students for global contexts, enhancing educational outcomes and international competitiveness. Keywords: English; pedagogy; teaching methodology; linguistics