Source code
This site is built on TTGC Learn, version 0.1.0.
The source code of the version that runs here is available from the organisation that runs this site. Ask them for a copy.
License
TTGC Learn is free software under the GNU Affero General Public License, version 3 only (AGPL-3.0-only), with additional terms that keep this attribution visible. You may use, study, share and change it under that license. The license text is available at gnu.org.