In recent years, CLIL technology has been widely used around the world as a tool for studying various
disciplines. However, there is a significant lack of its applications in chemistry and biology lessons. This
method improves the study of chemical and biological terms and concepts, contributing to the improvement of
communication abilities. Therefore, this study aimed to develop and pilot study the CLIL lessons in chemistry
and biology based on a subject-language integrated approach for 7-8 grades. The experiment was conducted at
Lyceum-Internet from 1.03-14.04.2023. The study developed CLIL lessons on the following topics: «Movement»,
«Coordination and regulation», «Human body», «Oxides», and «Chemical bonds» for students of grades 7-8.
The lessons developed by the authors were successfully used in chemistry and biology classes, as evidenced by
an increase in the academic level of knowledge of the experimental group in chemistry and biology. In addition,
a questionnaire was conducted after the experiment to determine the students’ attitudes towards CLIL lessons.
The study found that the students enjoy working in CLIL lessons, which has a positive effect on the acquisition
of knowledge in the subjects