Ck12.org Welcome to CK-12 Foundation | CK-12 Foundation
Ck12.org Overview
CK-12 Foundation is a reputable online educational platform that offers free resources to help students and teachers achieve their academic goals. The website has a clean and user-friendly interface that allows easy navigation throughout the site. It's worth noting that the website's name appears at the top left corner of the homepage, reinforcing the brand identity.
The main menu is displayed horizontally just below the header. It contains essential information such as 'Subjects', 'Concepts', 'Standards', and 'Study Guides'. Users can click each tab to explore further options. For instance, under 'Concepts', are several topics relevant to different academic disciplines such as Life Science, Physical Science, and Math. Another useful feature is the search bar located in the upper right corner. Users can type in keywords to search for specific topics.
The homepage is designed with a clear call-to-action to make it easier for users to find resources. It includes a section labeled 'Featured FlexBooks', where users can access free digital textbooks covering different subjects such as Social Studies, Science, and Math. Additionally, the homepage consists of a video tour, FAQ section, and recently updated topics.
CK-12 Foundation site is considered family-friendly. The website doesn't contain any content that is harmful, abusive, or hateful. The website is SSL-secured by GoDaddy, meaning that any personal information provided by users is safe and secure from unauthorized access.
However, when it comes to page speed, the site has an average performance, scoring 6 out of 100 on Google PageSpeed Insights, and has several recommendations for improvement, especially when it comes to mobile speed. To ensure users have a consistent and smooth experience, optimizing the site's speed should be a priority.
In summary, CK-12 Foundation is a great educational resource that offers a wide range of information on different subjects. The website is easy to navigate, and the homepage has well-placed calls-to-action. Although the site's performance score needs improvement, it's secure and free of harmful content, making it suitable for all ages.
Ck12.org Rank Summary
Audience Geography. Where are ck12.org visitors located?
| Country | Visitors |
|---|---|
 United States US | 62.6% |
| India IN | 4.3% |
| Canada CA | 3.7% |
| Taiwan TW | 2.7% |
| Colombia CO | 1.7% |
| Saudi Arabia SA | 1.6% |
| Philippines PH | 1.5% |
| United Arab Emirates AE | 1.5% |
| Spain ES | 1.4% |
| Other | 19% |
| Country | Pageviews |
|---|---|
| United States US | 68.4% |
| India IN | 5.7% |
| Canada CA | 4.2% |
| Taiwan TW | 2.7% |
| Australia AU | 1.2% |
| United Arab Emirates AE | 1.1% |
| Philippines PH | 1% |
| Saudi Arabia SA | 1% |
| Spain ES | 0.9% |
| Other | 13.8% |
| Country | Rank |
|---|---|
| United States US | 2637 |
| United Arab Emirates AE | 4114 |
| Philippines PH | 4498 |
| Canada CA | 4742 |
| Colombia CO | 5508 |
| Taiwan TW | 5771 |
| Peru PE | 5894 |
| Saudi Arabia SA | 7981 |
| Australia AU | 13093 |
| Spain ES | 14804 |
| India IN | 22749 |
| Pakistan PK | 28409 |
Where do visitors go on ck12.org?
| Subdomain | Pageviews |
|---|---|
| ck12.org | 60.47% |
| flexbooks.ck12.org | 37.05% |
| interactives.ck12.org | 2.13% |
| other | 0.35% |
| Subdomain | Pageviews per User |
|---|---|
| ck12.org | 2.1 |
| interactives.ck12.org | 1.7 |
| flexbooks.ck12.org | 1.7 |
| Subdomain | Reach |
|---|---|
| ck12.org | 63.33% |
| flexbooks.ck12.org | 48.13% |
| interactives.ck12.org | 2.76% |
How popular is ck12.org?
| Period | Global Rank | Global Rank Delta |
|---|---|---|
| past 3 months | 18601 | 362 |
| past month | 12138 | -7315 |
| past week | 12588 | 1195 |
| yesterday | 9456 | -1641 |
| Days | Pageviews Rank | Pageviews Rank Delta | Pageviews per Million | Pageviews per Million Delta | Pageviews per User | Pageviews per User Delta |
|---|---|---|---|---|---|---|
| 90 | 25800 | -190 | 259 | 1% | 2.4 | 3% |
| 30 | 18870 | -5233 | 36 | 44% | 2.2 | -23.13% |
| 7 | 20701 | 2742 | 33 | -15.15% | 2 | -9.091% |
| 1 | 15482 | 145 | 48 | -1.48% | 2.2 | -21.71% |
| Days | Reach Rank | Reach Rank Delta | Reach per Million | Reach per Million Delta |
|---|---|---|---|---|
| 90 | 17631 | 547 | 381 | -2.36% |
| 30 | 11170 | -8365 | 63 | 87% |
| 7 | 11226 | 736 | 61 | -6.486% |
| 1 | 9381 | -2246 | 80 | 30% |
Ck12.org Website Safety
We gather website safety and reputation data and compare it with available third-party sources so we calculate own safety and trustworthiness rate based on information that we get.
Norton ConnectSafe evaluates ck12.org for any unsafe and insecure content. The results are critical for families with young children.
SafeSearch is used as a parental control tool to filter out any inappropriate for your children search results on your devices: phones, tablets or personal computers.
Malware: not found.
Phishing: not detected.
Unwanted software: not found.
Harmfull applications: not found.
Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.
McAfee assesses ck12.org for a meaningful set of security threats. Featured dangers from annoying pop-ups to hidden Trojans, that can steal your identity, will be revealed. McAfee does not analyze ck12.org for mature or inappropriate content, only security checks are evaluated.
The WOT calculates reputation of the ck12.org. This reputation system receives ratings from users and information from third-party sources, assesses the ck12.org for safety features and confirms, whether ck12.org is suitable for children.
| Domain | ck12.org |
| Issuer Organization | Amazon |
| Issuer | Amazon RSA 2048 M02 |
| Algorithm | RSA-SHA256 |
| Valid form | 12/27/2023 |
| Expiration | 01/25/2025 |
| Signed | Certificate is not self signed |
| Additional Domains |
ck12.org *.ck12.org |
Ck12.org Rank History
Alexa Rank shows how popular ck12.org is in comparison with other sites. The most popular site has Alexa Rank equals 1. If ck12.org has Alexa Rank equals 100,000, then it is in TOP 100,000 popular sites in the world. The rank is calculated using a combination of average daily visitors to ck12.org and pageviews on ck12.org over the past 3 months.
Ck12.org Hosting Information
ASN ID: 16509
ASN Title: AMAZON-02 - Amazon.com, Inc., USLast Update: 07/16/2024
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
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# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
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ASNumber: 16509
ASName: AMAZON-02
ASHandle: AS16509
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Updated: 2012-03-02
Ref: https://rdap.arin.net/registry/autnum/16509
OrgName: Amazon.com, Inc.
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Address: 1918 8th Ave
City: SEATTLE
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Updated: 2017-01-28
Ref: https://rdap.arin.net/registry/entity/AMAZON-4
OrgAbuseHandle: AEA8-ARIN
OrgAbuseName: Amazon EC2 Abuse
OrgAbusePhone: +1-206-266-4064
OrgAbuseEmail: abuse@amazonaws.com
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OrgTechHandle: ANO24-ARIN
OrgTechName: Amazon EC2 Network Operations
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OrgTechEmail: amzn-noc-contact@amazon.com
OrgTechRef: https://rdap.arin.net/registry/entity/ANO24-ARIN
RTechHandle: AC6-ORG-ARIN
RTechName: Amazon-com Incorporated
RTechPhone: +1-206-266-2187
RTechEmail: ipmanagement@amazon.com
RTechRef: https://rdap.arin.net/registry/entity/AC6-ORG-ARIN
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#
Ck12.org Domain Registration and Settings
Domain Name: ck12.org
Registry Domain ID: e552d21b95954857afcf7ece2fab50b1-LROR
Registrar WHOIS Server: whois.networksolutions.com
Registrar URL: http://www.networksolutions.com
Updated Date: 2022-10-22T07:16:03Z
Creation Date: 2006-12-16T08:37:03Z
Registry Expiry Date: 2027-12-16T08:37:03Z
Registrar: Network Solutions, LLC
Registrar IANA ID: 2
Registrar Abuse Contact Email: domain.operations@web.com
Registrar Abuse Contact Phone: +1.8777228662
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registry Registrant ID: REDACTED FOR PRIVACY
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Registrant City: REDACTED FOR PRIVACY
Registrant State/Province: FL
Registrant Postal Code: REDACTED FOR PRIVACY
Registrant Country: US
Registrant Phone: REDACTED FOR PRIVACY
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Registrant Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Admin ID: REDACTED FOR PRIVACY
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Admin Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
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Tech Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Name Server: ns-1136.awsdns-14.org
Name Server: ns-161.awsdns-20.com
Name Server: ns-1687.awsdns-18.co.uk
Name Server: ns-977.awsdns-58.net
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2024-09-11T01:23:10Z
| Host | A Record | TTL |
|---|---|---|
| ck12.org | 216.137.44.119 | 60 |
| ck12.org | 216.137.44.48 | 60 |
| ck12.org | 216.137.44.89 | 60 |
| ck12.org | 216.137.44.38 | 60 |
| Host | MX Record | Priority | TTL |
|---|---|---|---|
| ck12.org | aspmx.l.google.com | 10 | 120 |
| ck12.org | alt1.aspmx.l.google.com | 30 | 120 |
| ck12.org | alt2.aspmx.l.google.com | 30 | 120 |
| ck12.org | aspmx2.aspmx.l.google.com | 50 | 120 |
| ck12.org | aspmx4.aspmx.l.google.com | 50 | 120 |
| ck12.org | aspmx5.aspmx.l.google.com | 50 | 120 |
| ck12.org | mail.ck12.org | 50 | 120 |
| Host | NS Record | TTL |
|---|---|---|
| ck12.org | ns-1136.awsdns-14.org | 172800 |
| ck12.org | ns-161.awsdns-20.com | 172800 |
| ck12.org | ns-1687.awsdns-18.co.uk | 172800 |
| ck12.org | ns-977.awsdns-58.net | 172800 |
| Host | TXT Record | TTL |
|---|---|---|
| ck12.org | 5dju5ttjauifkg3ntug8uvdp5o | 120 |
| ck12.org | MS=83D3333E19A93E86CB7555359D6048EE1B9BCFEA | 120 |
| ck12.org | MS=ms18161979 | 120 |
| ck12.org | apple-domain-verification=QF7bv1DM6D2BfMs3 | 120 |
| ck12.org | facebook-domain-verification=2f23smij2mb05apqoaktiu7od6tn98 | 120 |
| ck12.org | google-site-verification=5I-w_GO6CfZA1FDARhrWTvsloNHQJnWB3WpzO96Q5mI | 120 |
| ck12.org | google-site-verification=E3NQxLaOaxNDjKuRkg4JntlxjO0OkaV7R1i0iMIVMMI | 120 |
| ck12.org | openai-domain-verification=dv-9DfgnOGcp8UMZOccoCfU0yya | 120 |
| ck12.org | v=spf1 ip4:174.129.252.43 ip4:63.236.100.0/24 ip4:66.77.16.0/24 include:emsd1.com include:amazonses.com include:_spf.google.com include:mail.zendesk.com -all | 120 |
ns-161.awsdns-20.com
TTL: 900
Email address: awsdns-hostmaster.amazon.com
Serial: 1
Refresh: 7200
Retry: 900
Expire: 1209600
Minimum: 86400
Ck12.org HTML Check
Ck12.org Lighthouse Performance
Ck12.org Desktop Performance
Last tested: 12/07/2019
| Total Resources | 51 |
| Number of Hosts | 23 |
| Static Resources | 34 |
| JavaScript Resources | 25 |
| CSS Resources | 8 |
Ck12.org Mobile Insights
Last tested: 05/31/2017
| Total Resources | 117 |
| Number of Hosts | 27 |
| Static Resources | 97 |
| JavaScript Resources | 41 |
| CSS Resources | 7 |
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