Testimonials

See the opinions of students and educators just like you. Select from the following to learn more.

Let Your Students Explore with CK-12!
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Let Your Students Explore with CK-12!
Using CK-12 Every Day in Class
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Using CK-12 Every Day in Class
Instantly See CK-12 Content in More Than 90 Languages
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Instantly See CK-12 Content in More Than 90 Languages
Customizing CK-12 with Regional Content
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Customizing CK-12 with Regional Content
Save Money and Own Your Standards with CK-12
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Save Money and Own Your Standards with CK-12
Sharing CK-12 with Google Classroom and More
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Sharing CK-12 with Google Classroom and More
Why Teachers Love CK-12 FlexBooks®
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Why Teachers Love CK-12 FlexBooks®
CK-12's Free, Platform-Agnostic System for Finding and Editing OER Content
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CK-12's Free, Platform-Agnostic System for Finding and Editing OER Content
CK-12's PLIX and Interactives Help Students to Work Together
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CK-12's PLIX and Interactives Help Students to Work Together
CK-12 Made My Job Easier!
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CK-12 Made My Job Easier!
"I Use CK-12 Videos Whenever Possible"
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"I Use CK-12 Videos Whenever Possible"
CK-12 Meets and Exceeds Standards Requirements
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CK-12 Meets and Exceeds Standards Requirements

Comments from Educators

Improveing the motivation of my pupils

Maisa A.

I have read your biology books. With the help of ck books I am able to clear doubts of daughter and its helped me a lot. Thank you very much for CK

M.

CK-12 has provided resources so that I can be a more effective teacher!!

Lydia C.

CK-12 helps me find resources necessary for teaching standards and skills that are not in my current text book. It is supplemental material and websites that help me teach!

M Hance

I have just been assigned to teach 7th and 8th grade Science.

Lynn J.

i have used ck-12 while home educating my children via google apps

Luna F.

This resource has been invaluable to me. I can use it for remediation and acceleration. Thank you.

Louise P.

CK-12 has helped me provide online resources for my special education students to access at home!

Lurleen M.

I was able to create worksheet practice for my students.The videos available were also helpful in helping students review concepts

Lotoya G.

This has been an excellent resource for my class room. Our students do not have take home text books since we are a Title 1 school and money is limited. I have used this as a resource for homework and differentiation using your different workbooks. I have also used it as a large group presentation of a topic and then practiced using materials linked. I have also created several "webquest" type activities for use in our computer lab. Thanks for all of the hard work that went into this and I would love to see Social Studies/World/American history as fleshed out as the science is! Loved it!

Lorre C.

Comments from Students

It has helped me to learn and understand Math better.

Caitlin

CK-12 has helped me in science a lot, i have learned a lot through the practices.

Calyn B.

Ive used this site for about 2 years now. It has helped me throughout my highschool years. Im in 10th rightnow but ill continue to use this site for all my biology classes and chemistry . Ive used this to get answers on my assignments. To to able to unde

Asia E.

It helped me learn more about the topic I was studying.

Ashton F.

they helped me be smarter

Ashley

it made science fun and easier to learn.

Artasia

Ck-12 has allowed me to not have to lug a textbook to and from school, and still get relevant and interesting information about science.

Arrin

Ck-12 has helped me keep up in class when I am having trouble and do homework that my teacher assigns us from the website, I don't know what I'd do without Ck-12.

Arlene V.

I always interested in learning new things. Even being a University student, I use CK-12 to keep learning.

Arif A.

this website is awesome i use it every day

Ariel