**Mathematics and Multimedia GeoGebra Step-by-Step Tutorial Series**

The objective of the GeoGebra Step-by-Step Tutorial Series is not only to teach the readers how to use the software, but also to suggest how to use GeoGebra in teaching and learning mathematics. Most of the tutorials are (or will be) linked to related articles containing explanations and proofs about the mathematics discussed in the tutorials.

activities, with primary school children. I present results from the research and

development project "Creative Digital Mathematics", which aims to use the pupil's

development of mathematical board games as a vehicle for teaching skills with

GeoGebra, as well as an entrepreneurial attitude towards mathematics. Using the

instrumental approach I discuss how open ended transdisciplinary design activities

can support instrumental genesis, by considering the extent to which the pupils

address mathematical knowledge in their work with GeoGebra and how they relate

their work with GeoGebra and mathematics to fellow pupils and real life situations.

The results show that pupils' consider development of board games as meaningful

mathematical activity, and that they develop skills with GeoGebra, furthermore the

pupils considers potential use of their board game by classmates in their design

activities."