Credits and licences

Calcali’s pictures, icons, doodles, profile pictures, lessons, practice questions and code were made for Calcali. A few parts come from other people, who share their work freely. Thank you to them.

Fonts

• Lexend by Bonnie Shaver-Troup, Thomas Jockin and others, used under the SIL Open Font License 1.1.
• Latin Modern Roman by the GUST e-foundry (used for maths), under the GUST Font License.

Code

• QR Code generator by Project Nayuki, used under the MIT License (for setting up two-step sign-in).
• PDF.js by Mozilla, used under the Apache License 2.0 (to show PDF pages on whiteboards, when installed).
• Lucide icons (the settings gear), used under the ISC License.

Curricula

Calcali’s Library follows the topics taught in the National Curriculum for England, the US Common Core State Standards and the South African Curriculum and Assessment Policy Statement (CAPS). Calcali isn’t made by, or connected to, any exam board or government. Names like GCSE, A-level, Common Core and CAPS are used only to describe what each topic covers.

What people post

Questions, answers and public pages belong to the people who wrote them, who share them under CC BY-SA 4.0, so anyone can learn from them as long as they give credit. See the rules and copyright pages.