In the study designed according to the control group pretest-posttest design, STEM activities in the experimental group and traditional teaching practices in the control group were carried out. The study was conducted in a secondary school in Uralsk, Kazakhstan in 2022.

The aim of this study is to examine the effect of STEM-based activities on the development of speaking skills of students in secondary schools. However, how to teach speaking skills is an ongoing debate. In language teaching, speaking is one of the complex skills that need to be developed specifically. STEM is an interdisciplinary approach and provides an opportunity for students to learn these concepts and skills more meaningfully by integrating concepts and skills from different STEM fields and applying them to a real-life International Journal of Education in Mathematics, Science, and Technology (IJEMST) 391 problem or event (Altakhyneh & Abumusa, 2020 Baterna, Mina & Rogayan, 2020 Capraro, & Capraro, 2014 Wilson et al., 2022 Yang & Baldwin, 2022). The basis of STEM education is to bring real life problems to the educational environment and to offer various solutions (Aydogan & Koc, 2022 Breiner, Harkness, Johnson & Koehler, 2012 Hebebci & Maya Hebebci, 2021 Hebebci, 2021 Hebebci, 2022 Kaban, 2021 Serhan & Almeqdadi, 2021 ). STEM education is an educational approach that involves teaching science and mathematics by integrating them with the application possibilities provided by technology and engineering based on science and mathematics and covers all levels from pre-school to higher education (Gonen & Korkmaz, 2022 Landicho, 2020 Ozkan, 2022 Razi & Zhou, 2022).

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