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About me and this site

About me

My name is Xavier Bordoy. I’m teacher of Mathematics. Since season 2013-2014, I teach in an adults school in Mallorca (Spain). The levels that I teach are secondary school equivalent courses and preparation for taking exams to university and vocational training admission.


You have several communication channels to contact with me. Email is preferred.

About this site


This site is for storing all my teaching stuff: activities, exercises for students, resources, my blog.

The contents of this site are written, basically, in Catalan and English. The last one is not my mothern tongue so you might detect some grammatical mistake in documents written in such language. Also, the expressivity in English documents is not what I wish. In case you detect any mistakes, please let me know using any of the above-mentioned contact channels. If you think that any part of this site could be improved, please let me know also.

Some rights reserved

Except where otherwise noted, the content on this repository (including comments) is licensed under a Creative Commons Attribution 4.0 International license. This means, essentially, that you are free to use, modify and distribute the contents of this site as long as you give appropiate credit, provide a link to the license and indicate if changes were made. For more information, see the legal terms of the license.

I intend to use works licensed under a Creative Commons licence or in public domain. I prefer CC-BY and CC-BY-SA because I think they fits better my needs: they allow translations and modifications (the NoDerivatives licenses does not allow them). In case I could not use these kinds of licenses and I need to use classic copyrighted materials, the use of works is done under the protection of:

All trademarks and registered trademarks are the property of their respective owners.


For building this sitre, I have used free, or at least open source, software and documentation. Specificaly, I have used the following items:

Source code

As a mathematician, I believe that progress in any matter is made when people can reproduce and improve what other people have done. So, I think we need to show all details on how we make things. Because of that, the source code of the entire site is available in this repository. You can clone it or download it (zip file).


Ministerio de Cultura. 1996. “Entrada 8930 Del Real Decreto Legislativo 1/1996, de 12 de Abril, Por El Que Se Aprueba El Texto Refundido de La Ley de Propiedad Intelectual, Regularizando, Aclarando Y Armonizando Las Disposiciones Legales Vigentes Sobre La Materia.”

Wikipedia. 2016. “Fair Use.”