Testimonials

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

Use CK-12 FlexBooks® to Replace Traditional Textbooks
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Use CK-12 FlexBooks® to Replace Traditional Textbooks
Creating Teams to Make CK-12 FlexBooks®
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Creating Teams to Make CK-12 FlexBooks®
Many Reasons to Use CK-12 FlexBooks®
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Many Reasons to Use CK-12 FlexBooks®
Translate FlexBooks® with just One Click!
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Translate FlexBooks® with just One Click!
The Power of CK-12's Highlighting Tool and Word Definitions
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The Power of CK-12's Highlighting Tool and Word Definitions
Finding the Right People to Pilot CK-12 FlexBooks®
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Finding the Right People to Pilot CK-12 FlexBooks®
Curating CK-12 FlexBooks® for Relevance and Engagement
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Curating CK-12 FlexBooks® for Relevance and Engagement
Incorporating Current Events into a CK-12 FlexBook® the Next Day
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Incorporating Current Events into a CK-12 FlexBook® the Next Day
CK-12 is the High Quality Online Resource Teachers and Students Can Trust
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CK-12 is the High Quality Online Resource Teachers and Students Can Trust
Talk to the Text with CK-12's Highlighting Tool
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Talk to the Text with CK-12's Highlighting Tool
El Paso Bought Laptops and Still Saved Money with CK-12!
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El Paso Bought Laptops and Still Saved Money with CK-12!
Upgrade, Update, and Customize with CK-12
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Upgrade, Update, and Customize with CK-12

Comments from Educators

In the digital age I find have a paper textbook for a dynamic science world limiting and not budget wise. Thank you for making this service available! I find it very useful as a resource in my classroom.

Charles R.

teaching

bryant

Amazing resource! With so many statewide educational budget cuts, it has been extremely difficult to find quality teaching resources. cK-12 has filled that niche quite nicely! I would recommend this valuable site to anyone. Thanks!

Bryan H.

Ck12.org has helped each and every student who has come to our center. I was been a great experience for our students, as well as a enormous help for the teachers! CK12.org has made our learning journey easier and more exciting!!!

Bright Harbor Academy

Identify resources staff can use to develop relevant science curriculum

Brian A.

This is a great "go-to" site for my daughter and I when she is struggling with a new math concept and needs that extra help. Thanks cK-12!!

Brenda S.

helped me learn how to do my math better

Brady

CK12 has helped me assist others by allowing them to be a part of this learning initiative.

Boris A.

I LOVE YOU guys thank u very much i appreciate your efforts for helping students to learn their subjects.

Biswajit

Thankyou thankyou thankyou very much for providing these resources for free. ck-12.org is very great resource for students it is very helpful in schools and out of schools for self study.

Biswajit

Comments from Students

It lets me learn lessons at my own pace and learn from my mistakes so I really like that.

Flor F.

I love how well the examples are explained and i couldn't do my homework without it. :0

Fernanda

CK-12 has helped me memorize lots of new scientific words and helped me become better and smarter at paying close attention in what I am reading. I also like how it doesn't take a lot of time to complete a task. It only takes me about 15 minutes to comple

Fernando

cK-12 has been part of my experience as student and has been helping me to discover in a different way the sciences

Estefany V.

i like using ck 12 because it helps me learn alot.

Felsiha, Daquan

Ck12 has helped me learn how to find keywords in the question and match it with the answer

Ervin M.

It has helped me improve my Science skills, and continues to help me more often as I prepare for my AP Exams. Happy 10th Anniversary!!!

Esperant K.

helped me learn and understand more.

Emmalee

Happy 10th anniversary! Great job so far, you have helped me so much because you are online so I can access you anywhere!

Emma T.

Ck12 helped me pass my science class this year. #youlit

Emma H.