Free Online Textbooks, Flashcards, Practice, Real World Examples, Simulations | CK-12 Foundation CK-12 Foundation provides a library of free online textbooks, videos, exercises, flashcards, and real world applications for over 5000 concepts from arithmetic to history
Monthly Visitors 3,68M
Estimated Price $635,184


Domain age of is 11 years. Traffic is around 2,73M visitors during previous month, which corresponds to 2217 place in the global site ranking. During this month, traffic to site has increased by 34% compared to previous month, and equals to 3,68M visitors. Estimated potential revenue of this site may be up to $17,644 per month. We did not find any sites that have the same ID at Analytics and/or Adsence. According to our information, it is safe to visit

Monthly Visitors

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Sep'18 (est) 3,68M
Aug'18 (est) 2,73M
Jul'18 (est) 471K
Jun'18 (est) 731K
May'18 (est) 1,58M
Apr'18 (est) 623K
Mar'18 (est) 2,13M
Feb'18 (est) 2,94M
Jan'18 (est) 3,00M
Dec'17 (est) 1,70M
Nov'17 (est) 2,21M
Oct'17 (est) 2,19M
Sep'17 (est) 2,27M
Aug'17 (est) 948K
Jul'17 (est) 493K
Jun'17 (est) 796K

SiteGur Score

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Sep'18 6275
Aug'18 8846
Jul'18 -3075
Jun'18 -2381
May'18 -1464
Apr'18 -7536
Mar'18 -1484
Feb'18 4135
Jan'18 9974
Dec'17 -3884
Nov'17 -979
Oct'17 -1151
Sep'17 6227
Aug'17 7649
Jul'17 -2746
Jun'17 -348

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Traffic Source

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Estimated Cost and Revenue value: $635,184

Daily Ads revenue: $588

Monthly Ads revenue: $17,644

Yearily Ads revenue: $211,728

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Other information creation: 15 December 2006 expired: 15 December 2017 information first time archived: 04 May 2007 last time archived: 05 July 2015 how many times: 295