Dynamic Geometry
Environments (DGEs) in 2D are one of the well researched topics in mathematics
education. DGEs for 3D-environments (Archimedes, Geo3D and Cabri 3D) were
designed in Germany and France. Mathias Hattermann studied the specific dragmode
in 3D Geometry environments. He showed that pre-service teachers with
previous knowledge in 2D-systems prefer to work with a real model of a cube instead
of the 3D-system to solve certain problems. Previous knowledge in 2D-systems
seems to be insufficient to handle the drag-mode in an appropriate way in 3Denvironments.
In a second study, he introduced the students to the special software
before the investigation and distinguished different dragging modalities during the
solution processes of two tasks.