About ck12.org
Is a reliable website. We determined the efficiency score of the site as %56.
Site Title Free Online Textbooks, Flashcards, Adaptive Practice, Real World Examples, Simulations | CK-12 Found and dmoz title is Ck12.org.
The website's html version is html3, IP Address is 54.243.211.55 and Alexa Rank is 129789
Is the most visited of the United States.
Site Categories : k-12 education, flexbook, oer, curriculum, digital textbooks, ebooks, lesson plan, worksheet, textbook, study guides
Technologies for ck12.org
RATE (Update Weekly)
% 56HTML size of ck12.org
HTML and text sizes are used in the main page of www.ck12.org like the graph.
- HTML size is 66KB, compressed HTML and Text Size are 53KB and 19KB.
- There is up to 0 percent of the difference between the size of HTML and the compressed HTML size. If you can compress your HTML, you can have a smaller size site.
Security Information
| Google Safe Browsing | : No Risk |
| Siteadvisor Rating | : Good |
| WOT Trustworthiness | : Excelent |
| WOT Privacy | : none |
| WOT Child Safety | : none |
Used Some Html Tags
HTML tags used in the main page of www.ck12.org like the graph
| Html Tag | % | Used | |
| head | 1% | 1 | |
| img | 5% | 18 | |
| body | 1% | 1 | |
| iframe | 1% | 1 | |
| div | 23% | 84 | |
| a | 29% | 107 | |
| nav | 1% | 2 | |
| br | 1% | 1 | |
| ul | 4% | 13 | |
| li | 5% | 16 | |
| span | 31% | 113 | |
| i | 2% | 5 | |
| section | 2% | 4 | |
| h3 | 1% | 3 | |
| h4 | 1% | 1 |
Dmoz Information
Title : Ck12.org
Description : CK12, a non-profit organization launched in 2006, aims to reduce the cost of textbook materials for the K-12 market both in the US and worldwide. Using an open-source, collaborative, and web-based compilation model that can be manifested as an adaptive textbook - termed the "FlexBook", CK12 intends to pioneer the generation and distribution of high quality educational web texts. ...
Categories :
Visited by Browsers
Most using browsers visited this website
| Browser | % | Using | |
| Chrome | 62% | 43 | |
| Internet Explorer | 12% | 8 | |
| Firefox | 19% | 13 | |
| Safari | 6% | 4 | |
| Opera | 3% | 2 |