CK-12 provides content not only from our website but from third party sites as well. If your school would like to make CK-12 accessible please add the list of websites below.
Enable http and https for the following domains:
- *.zendesk.com
- *.optimizely.com
- *.ck12.org
- *.cloudfront.net
- *.invoc.us
- googleapis.com
- google.com
- googletagmanager.com
- google-analytics.com
- hubspot.com
- www.ck12.org
- braingenie.ck12.org
- iloserver.ck12.org
- d1mgzmvrdgdhkc.cloudfront.net
- educreations.com
- youtube.edu
- youtube.com
- vimeo.com
- schooltube.com
- kqed.org
* = allow access to all domains and subdomains