Materials I create and share here can be freely used. See the guidance below.

The content of this website - except where otherwise noted - is licensed under a free license so you can make use of it legally without needing to ask me. The license is available in different languages.

Using the Material

If you use the material provided by this website and distribute it, please note the following:

  • This is a copyright license and does not give rights to my trade mark. Ask me if you want to use my logo.
  • Keep the links intact or use the text version of the license below.
  • If you change or use the parts of my material, I am grateful to hear from you.
  • If you improve a substantial portion of the content, consider adding your name next to mine.

Web Version

To copy it with links:

This work © 2024 by Kirstin Heidler is licensed under CC BY-SA 4.0

To embed it on a website:

<p xmlns:cc="" >This work © 2024 by <a rel="cc:attributionURL dct:creator" property="cc:attributionName" href="">Kirstin Heidler</a> is licensed under <a href="" target="_blank" rel="license noopener noreferrer" style="display:inline-block;">CC BY-SA 4.0</a></p>

Text Version

If you print it and cannot have the links working:

This work © 2024 by Kirstin Heidler ( is licensed under CC BY-SA 4.0. To view a copy of this license, visit


You can copy this into Markdown documents:

This work © 2022 by [Kirstin Heidler]( is licensed under [CC BY-SA 4.0](