In recent years, CLIL technology has been actively used in the world as a tool for studying various disciplines, but there is a large shortage of applications in chemistry and biology lessons. This method allows you to study chemical and biological terms and concepts, contributing to the improvement of communication abilities. For this reason, our work aimed to develop and approbate the CLIL lessons in chemistry and biology based on a subject-language integrated approach for 7-8 grades. 

The experiment was conducted at Karaganda's Lyceum-Internet 'Bilim-Innovation' No. 2 from March 1st, 2023 to April 14th, 2023. We have developed CLIL lessons on the following topics: «Movement», «Coordination and regulation», «Human body», «Oxides», and «Chemical bonds» for students of grades 7-8. These lessons developed by the authors were successfully applied in chemistry and biology lessons, evidence of this is an increase in the quality of knowledge in the experimental group in chemistry and biology. In addition, to determine the attitude of students towards CLIL lessons, a questionnaire was conducted after the experiment. Our study showed that more than 75% of students enjoy working in CLIL lessons, and this positively affects the assimilation of knowledge in the subjects.