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 1.08M
Estimated Price $187,020


Domain age of is 11 years. Traffic is around 1.70M visitors during previous month, which corresponds to 8481 place in the global site ranking. During this month, traffic to site has decreased by 36% compared to previous month, and equals to 1.08M visitors. Estimated potential revenue of this site may be up to $5,195 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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Jan'18 (est) 1.08M
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
Nov'16 (est) 2.12M
Oct'16 (est) 2.31M

SiteGur Score

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Jan'18 -6781
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
Nov'16 -1817
Oct'16 -579

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Traffic Source

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Estimated Cost and Revenue value: $187,020

Daily Ads revenue: $173

Monthly Ads revenue: $5,195

Yearily Ads revenue: $62,340

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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