ABSTRACT
These standards clearly encompass a broad view of geometry, including the need for students to develop conceptual understanding and problem-solving abilities in a three-dimensional environment.
2 Issues Faced by Students in Secondary Geometry Meeting the standards proposed by NCTM requires students to move from description to analysis, abstraction, and finally formal proof, as described in the Van Hiele Model Levels of Geometric Thinking:
• Level One: Visualization Children at this level can recognize figures by their physical appearance.
