# STACK licences

The STACK source code is Licensed under the [GNU General Public, License Version 3](https://github.com/maths/moodle-qtype_stack/blob/master/COPYING.txt).

The STACK documentation, contained in the [source code](https://github.com/maths/moodle-qtype_stack) subdirectories of `doc/`,  is licensed under a [Creative Commons Attribution-ShareAlike 4.0 International License](https://creativecommons.org/licenses/by-sa/4.0/).

The STACK sample questions and materials, contained in the subdirectories of <tt>samplequestions/</tt>, is Licensed under the [Creative Commons Attribution-ShareAlike 4.0 International License](https://creativecommons.org/licenses/by-sa/4.0/).

STACK imposes no requirements on users to choose a license for learning materials they write from scratch.  We are aware of open (e.g. Creative Commons), closed, and commercial uses of STACK materials.  Users remain responsible for respecting existing licences attached to shared learning materials.

It is possible to embed other media inside STACK questions.  Users of STACK remain entirely responsible for complying with licenes for materials and media embedded inside STACK questions.  Please note that the [GeoGebra's license](https://www.geogebra.org/license) does not match the [STACK licence](https://github.com/maths/moodle-qtype_stack/blob/master/COPYING.txt).

### AutoOMath Project, 2021-2023

The creation of these resources has been (partially) funded by the ERASMUS+ grant program of the European Union under grant No. 2021-1-DE01-KA220-HED-000032031. Neither the European Commission nor the project's national funding agency DAAD are responsible for the content or liable for any losses or damage resulting of the use of these resources.