With the rapid advancement of science and technology, society's demand for talent places greater emphasis on cultivating character and key abilities. Plane geometry is a crucial component of the middle school mathematics curriculum, serving as a vehicle for developing students' abilities in intuitive visualization and logical reasoning. It plays a unique role in fostering students' problem awareness, improving their observation skills, logical reasoning abilities, and problem-solving capabilities. Based on mathematical core competencies, this article analyzes the entire process of plane geometry instructional design—"preparation, implementation, and reflection"—keeping the goal of "competency enhancement" central throughout, thereby concretely implementing mathematical core competencies in teaching.

Cong Chen, Shaoli Jin. Research on Instructional Design for Middle School Plane Geometry Based on Mathematical Core Competencies: A Case Study of the Triangle Midline Theorem. International Journal of New Developments in Education (2025), Vol. 7, Issue 8: 25-30. https://doi.org/10.25236/IJNDE.2025.070804.

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