Overview
Casyopée is a free opensource software environment for the learning of functions at secondary school level. It aims at making numeric, graphic and formal exploration of mathematical functions easier. A dynamic geometry unit, integrated in CasyopÃ©e's environment, offers possibilities to explore and to model geometrical situations into functions. Casyopée is focused on problem solving about and using functions, modelling and proof. It gives specific help to the student in his/her activities, thanks to symbolic computation.
With Casyopée, power means neither complexity nor lack of rigor :
 choices of representation are in line with mathematical conventions at secondary level ;
 driving Casyopée is easy, without any command language ;
 the goal is to help the student, not to restrain him/her.
With a piece of software like Casyopée, the role of the teacher is crucial: examples of classroom use are available through the "Using Casyopée" menu on the left.

Research papers involving Casyopée use
Kafetzopoulos, G.I., Psycharis, G. (2016) Conceptualising function as covariation through the use of a digital system integrating cas and dynamic geometry. In Csíkos, C., Rausch, A., & Szitányi, J. (Eds.). Proceedings of the 40th Conference of IGPME, Vol. 3, pp. 67–74. Read on Line
TRần, K.M. (2016) Exploring the potential of digital technology for the teaching and learning of functions: the case of Casyopée, The Electronic Journal of Mathematics and Technology, 10.1, 5768. Read On Line
Minh, T. K., Lagrange, J.B. (2016) Connected functional working spaces: a framework for the teaching and learning of functions at upper secondary level. ZDM Mathematics Education on line first. Read On Line
Yuliana, N. (2015) Casyopee dalam pembelajaran matematika,Indonesian Digital Journal of Mathematics and Education Vol 2.3 Read on Line
