Credits

The lessons were created and illustrated by:

• Dan Cupak

• Jan Pipek

• Jakub Urban

• Karla Fejfarová

• Kateřina Vidnerová

• Klára Vidnerová

• Lumír Balhar

• Ondřej Kokeš

• Petra Vidnerová

• Petr Messner

• Petr Šimeček

• Roman Diba

Unless otherwise noted, the lesson materials are available under the Creative Commons Attribution-ShareAlike 4.0 International license (CC BY-SA 4.0).