Vận dụng lí thuyết giáo dục toán thực trong dạy học nội dung “Định lí Thalès” (Toán 8)

Tóm tắt

In the context of mathematics education connected to real-life situations, the application of the theory of realistic mathematics education is regarded as an important approach to help students acquire knowledge more deeply and sustainably. For Ggrade 8 students, Thales’ theorem is a core topic with various applications in calculating quantities that cannot be measured directly. This study employs theoretical and analytical methods to clarify key concepts of the theory of realistic mathematics education, including horizontal and vertical mathematization, as well as the notions of “model of” and “model for.” On this basis, the paper proposes a process and instructional approach for teaching Thales’ theorem in accordance with the principles of realistic mathematics education. The findings contribute to strengthening both the theoretical and practical foundations for applying this theory in lower secondary mathematics education, thereby improving the effectiveness of teaching the topic “Thales’ theorem” (Mathematics 8).