Terms of Service

Draft: not yet reviewed by a lawyer. This page must be reviewed and finalized before public launch (see docs/LEGAL.md).

Plain-English summary first, details below.

The short version

Crayon CS teaches computer science. It is educational content only.
We are not a school. We don’t award degrees or academic credit, and we can’t promise any job, grade or result.
You must be at least 16 to create an account.
Use what you learn responsibly, especially security lessons.
Our lessons are our work. Please don’t copy or resell them.

1. The service

Crayon CS (“we”) provides online lessons, exercises and projects about computer science. Foundations content is free. Advanced content requires a paid subscription once available.

2. No accreditation, no guarantees

Crayon CS is not an accredited institution and is not affiliated with any university. Certificates of Completion show that you finished our material; they are not degrees, diplomas or academic credit. We work hard to be accurate, but content is provided “as is” without warranties, and we don’t guarantee any educational, employment or exam outcome.

3. Age

You must be at least 16 years old to create an account or subscribe. The free lessons can be used without an account.

4. Acceptable use

Security lessons and exercises may only be practiced on the sandboxed targets we provide, or on systems you own or have explicit permission to test.
Don’t try to disrupt the site, break its paywall, or scrape its content.
Academic integrity: our problems are original and teach concepts. Using Crayon CS to complete graded work in a way your school forbids is your responsibility.

5. Our content

All lessons, text, illustrations, widgets, exercises and code on Crayon CS are owned by Crayon CS. You may use them for your personal learning. You may not copy, republish or sell them. Code you write in exercises belongs to you.

6. Subscriptions (when Advanced launches)

Prices, renewal terms and cancellation will be shown clearly before purchase. You’ll be able to cancel online at any time. Payments are handled by our payment provider, which acts as the merchant of record.

7. Limitation of liability

To the extent permitted by law, Crayon CS is not liable for indirect or consequential damages arising from use of the service.

8. Changes

We may update these terms. We’ll note the date of the latest change on this page.

9. Contact

Questions: [contact email to be added]