A study of geometry teaching mode based on Van Hiele theory and NetPad.

It is one of the main goals of the mathematics curriculum reform to cultivate and develop geometric thinking in junior high school students. Geometric thinking skills have a very profound impact on middle school students learning of mathematics. Van Hiele's theory is dedicated to reducing the gap between the level of difficulty defined by the material and the thinking of the students. It provides strong theoretical support for analyzing the development process of students' geometric thinking and evaluating their level of geometric thinking. With the combination of dynamic geometry software (NetPad) and Van Hiele theory, this study proposes a geometry teaching mode for junior high school students' geometric thinking cultivation, which includes five teaching sessions of Interview, Direct Orientation, Explication, Activities, and Integration. An effective teacher-led, student inquiry-based teaching process, it helps students discover geometric patterns, understand geometric properties, and improve their geometric thinking. The effectiveness of the mode was verified by seventh graders using NetPad to explore Euler's theorem. The results verified the effectiveness of this geometry teaching model to a certain extent. On the other hand, it proves that this model can help improve teaching efficiency. The teaching practice provides a program reference for teachers to design a scientific and reasonable geometry lesson.