Teaching Geometry through Dynamic Modeling in Introductory Engineering Graphics.

This paper is part of an ongoing set of papers by Wiebe, Branoff, and Hartman looking at how constraint-based 3D modeling can be used as a vehicle for rethinking instructional approaches to engineering design graphics. In particular is the goal of moving from a mode of instruction based on the crafting by students and assessment by instructors of static 2D drawings and 3D models. This approach to instruction results in overemphasis on correct size and style of geometric elements (e.g., the ‘look’ of the graphic), rather than on the underlying problem-solving process used to create the model. Instead, an approach based on dynamic modeling is proposed. This approach provides the opportunities for students to learn about geometry through the embedding of geometric behaviors into models and then testing these behaviors via dynamic change of the model. This approach is better aligned with larger goals of better problem-solving abilities in the technology and engineering workforce. Example instructional activities are presented.