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 2.31M
Estimated Price $399,924


Domain age of is 10 years. Traffic is around 2.27M visitors during previous month, which corresponds to 4134 place in the global site ranking. During this month, traffic to site has increased by 2% compared to previous month, and equals to 2.31M visitors. Estimated potential revenue of this site may be up to $11,109 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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Oct'17 (est) 2.31M
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
Sep'16 (est) 2.53M
Aug'16 (est) 1.34M
Jul'16 (est) 969K

SiteGur Score

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Oct'17 935
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
Sep'16 4376
Aug'16 4213
Jul'16 -2265

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Traffic Source

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Estimated Cost and Revenue value: $399,924

Daily Ads revenue: $370

Monthly Ads revenue: $11,109

Yearily Ads revenue: $133,308

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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