CK-12 Foundation on new websites

Nonprofit providing free K-12 educational content and STEM resources.

Sites using CK-12 Foundation
2
since Sep 2026
Last 30 days
0.0%
of new sites, to Oct 23
no change on the 30 days before
Last 7 days
0.0%
of new sites, 7-day average
no change on the week before
Rank in Education
#98
of 298 tools, all time
First seen Sep 23, 2026
Last seen Sep 24, 2026
Website ck12.org

What we found

  1. CK-12 Foundation appeared on 1 new site in the last 30 days.[1]

Share of new sites using CK-12 Foundation

0.0000% 0.0002% 0.0004% 0.0006% 0.0008% 16 Sep Oct

The line is the 7-day average share of new sites that use CK-12 Foundation, since 16 September. It starts at our first detection.

Education on new sites

# Movement Tool Share of all sites Share of category Bar
1 – Moodle <0.1% 31.4%
2 – Scratch <0.1% 3.9%
3 ▲2 CTFd <0.1% 3.4%
4 ▲14 Udemy <0.1% 2.9%
5 ▼1 GeoGebra <0.1% 2.8%
6 ▼1 Rocket LMS <0.1% 2.4%
7 ▲10 Awari System <0.1% 2.4%
8 ▼44 Find And Study <0.1% 1.7%
9 ▼35 Thinkific <0.1% 1.7%
10 ▼2 New Learning Moodle Theme <0.1% 1.5%
11 ▼11 Classplus <0.1% 1.4%
12 Teacher.dev <0.1% 1.3%
…
98 CK-12 Foundation <0.1% 0.1%

All-time shares across the new sites we track: of all of them, and of the sites using any Education tool. All 298 in Education

Recently launched products built on CK-12 Foundation

2 of the 2 sites using CK-12 Foundation are product launches we list individually.

Site Found Also detected
Cubs: One calm place for your family's week cubsfamily.ai · Productivity Sep 24 Next.js React Vercel Anthropic
Cubs: One calm place for your family's week cubsfamily.app · Productivity Sep 23 Next.js React Vercel Anthropic

Notes

  1. These figures cover websites that went live since April 2026, not the web as a whole.

How this page is made

FirstSited looks at each new website near the day it goes live and records what it was built with. We do not go back later, so these figures describe what sites launch with, not what they run today. A site counts towards CK-12 Foundation when we detect CK-12 Foundation on it at that look.

Every share on this page is a proportion of the new sites we were tracking at the time. Sites we found across the wider web count towards the figures, but only product launches are listed by name. How we detect technologies · How we find new sites

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.