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 3.11M
Estimated Price $538,020


Domain age of is 11 years. Traffic is around 2.94M visitors during previous month, which corresponds to 2866 place in the global site ranking. During this month, traffic to site has increased by 5% compared to previous month, and equals to 3.11M visitors. Estimated potential revenue of this site may be up to $14,945 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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Mar'18 (est) 3.11M
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
May'17 (est) 681K
Apr'17 (est) 1.60M
Mar'17 (est) 2.98M
Feb'17 (est) 3.40M
Jan'17 (est) 2.21M
Dec'16 (est) 1.91M

SiteGur Score

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Mar'18 3800
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
May'17 -1889
Apr'17 -7118
Mar'17 -1585
Feb'17 3194
Jan'17 4497
Dec'16 -2202

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Traffic Source

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Estimated Cost and Revenue value: $538,020

Daily Ads revenue: $498

Monthly Ads revenue: $14,945

Yearily Ads revenue: $179,340

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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