Content: CC BY 4.0

Tool content, teacher notes and site text are licensed under Creative Commons Attribution 4.0. You can copy, share, remix and adapt it for any purpose, as long as you credit Curio Class.

Code: MIT

The code inside each tool is MIT licensed, so developers can fork and improve it.

Third-party material

Some tools include open-source libraries or public-domain data. Each tool lists them under Sources and license, and each library keeps its own license.