The effectiveness of certain digital tools, such as DGEs,
as well as their increased availability, has also affected
researched on topics that span the k-16 geometry curriculum
(from early experiences with dynamic triangles to later
explorations in spherical geometry) as well as major areas
of research such as the proving process (see Sect. 6) and
the use and role of definitions (see Sect. 7). While DGEs
have been available for over two decades now, several axes
of research remain understudied, particular in terms of task
design and teacher practice. Given the recent push in many
countries to increase computational thinking in the curriculum,
an interesting area of study may be to explore how
DGEs, as well as other digital tools described in Sect. 5,
might offer occasions for coding, particularly when students
are asked to model a certain phenomenon using the
geometric and numerical primitives of the software.