Metacognitive skills are the ability of students to recognize, control, and regulate their thought processes. In recent years, researchers have been paying special attention to the development of these skills, as they are key to the formation of autonomous learning, critical thinking and success in an academic environment. The main purpose of the study was to study the effectiveness of thinking visualization tools in the development of students' metacognitive skills. Theoretical methods: analysis of scientific literature, comparative analysis of approaches to visualization of thinking, empirical methods: pedagogical experiment, student testing, surveys and questionnaires, statistical methods: quantitative analysis of academic performance, data processing using methods of correlation and comparative analysis. This article presents the results of a practical study conducted during the academic year at the Nazarbayev Intellectual School of Chemical and Biological Sciences in Pavlodar among 11th grade students taught in English.