Resumen de How ‘tall’ is the triangle? Constructionist learning of shape and space with 3D Pens

Oi-Lam Ng

• In this paper, I discuss the potential transformations to teach K-12 geometry topics with the technology of 3D Pens, which enabled 3D models to be created instantly via one’s moving hands. I draw on an example of using constructionist learning activities with 3D Pens to teach young children, ‘how tall is the triangle?’