The study was examined, the technology for creating students' educational and cognitive activity skills through mathematical modelling was aimed and designed. As a model, this study was helped by the quantitative research model, and the research was carried out in the fall term of 2022–2023. 172 volunteer students who continue their education in high schools participated in the research. In the study, 3 weeks of online training was given to the students. The data collection tool was delivered to high school students by online method and collected. The analysis of the data was added to the research by tabulating the findings from the participants. When the results dimension of the study was examined comprehensively, it was concluded that the cognitive activity levels of the students were high through mathematical modelling. While this situation was determined as good for education, it was concluded that it was used by reflecting the mathematics and technology systems in the course. Keywords: High school students, mathematical modelling, cognitive activity, mathematics, independent work, cognitive impairment, mathematical modelling, problem, verbal calculation;