Core Code4Kids domains (allow these)

If your filter supports wildcards, allow *.c4k.io

If not, allow the hostnames below:

• https://app.c4k.io (Code4Kids App)
• https://api.c4k.io (Code4Kids API)
• https://c4k.io (marketing & help content)
• https://curriculum.c4k.io (printable / offline instructional materials)
• https://cdn.c4k.io (static assets)
• https://canva.c4k.io (Canva hosted instructional materials)
• https://scratch.c4k.io (interactive coding activities, self-hosted)

Trusted learning resources (allow these - used as needed)

These help deliver fonts, lesson documents, media, and interactive content used in class.

• https://fonts.googleapis.com (Google Fonts)
• https://fonts.gstatic.com (Google Fonts assets)
• https://docs.google.com (lesson docs & teacher materials)
• https://scratch.mit.edu (interactive coding activities)
• https://youtube.com (video lessons, if permitted by school or district policy)
• https://c4k-media.vercel.app (virtual robotics environment)
• https://c4k-media.now.sh (virtual robotics environment)