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

Thanks for providing free, high quality resources for kids and teachers! I love the flexible way that resources can be built.

Mark H.

with my son's science project

Marianne

In many instances, available resources are not sufficient to explain a particular problem, so it is a relief to be able to turn to cK-12 for help.

Marion N.

I use it for Credit Recovery Program. My students like it!

Maria

I am just starting to use Ck-12, so far it seems like a great resource for homeschooling my daughters.

Margaret B.

love the worksheets

Marcie C.

happy 10th anniversiry.

Margaret

The drill and practice has helped my son recognize which function a math problem requires.

Marc M.

to edcuate lower class student

Manish

video tutorials for lesson plans!

Macie M.

Comments from Students

CK-12 makes science so much more accessible. We use it in school all the time, and it never fails to clarify anything that I don't quite understand. Thank you and happy anniversary, CK-12!

Hannah

it has helped me pass science tests

Hallie

It has helped me pass my physics class and it teaches me a lot and prepares me for my tests.

Hamza Q.

CK-12 has been helping get through my Geometry class with no problems what so ever. Thank you CK-12!

Hall

u helped me learn a lot thanks

Haley M.

U helped me on my worksheets.

Haley H.

ck-12 has made my grades better and me more knowledgeable. It has been a BIG help in school!It also let me communicate with people who knew about what i learned on ck-12 as well! I think everybody should give ck-12 a try!

Guy S.

It has helped me so much, I get my work done

Haley

Thanks, CK-12 has been really helpful

Gwen

It helped me with math and helped me understand algebra more

Guadalupe