RT Book, Section T1 Using free open source software for intelligent geometric computing A1 Abánades, Miguel Á. A1 Botana, Francisco A1 Escribano Martínez, Jesús A1 Valcarce, José L. AB This paper describes some examples of fruitful cooperation between geometric software tools (in particular, GeoGebra) and a free open source computer algebra system, Sage (Software for Algebra and Geometry Experimentation). We collect some of our efforts for enhancing mathematics education via technologically rich environments. We show that a math teacher with no specialized programming knowledge can mix widespread resources to get motivating new teaching tools. Furthermore, we explore an exciting but barely used (even known!) characteristic of Sage: its use as a remote kernel. We test it by computing symbolic tasks in a dynamic geometry prototype that are currently out of scope of standard dynamic geometry software. Finally, we illustrate the development of web-based geometric resources by communicating GeoGebra and Sage through Javascript. PB Springer SN 978-3-642-21897-2 YR 2011 FD 2011 LK https://hdl.handle.net/20.500.14352/45483 UL https://hdl.handle.net/20.500.14352/45483 LA eng NO International Conference, Santander, Spain, June 20-23, 2011. Proceedings, Part IV DS Docta Complutense RD 27 dic 2025