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

I have two children. One is 10 and the other 7 and they both are getting better with math as the semesters go by. Thank you for makimg this site free.

Chantely B.

well I am impressed by the high quality of the material, best of all, free to use. Keep up the good work!

Cesar R.

I love the helpful video links within the textbook and the integrated practice problems for the students

Cathy C.

I have used parts and all of many lesson plans. Thanks.

Cathryn B.

Providing guided resources for teaching Earth Science. I class that I only recently began teaching was incredibly beneficial

Cassy B.

It has given my students wonderful lessons!

Carolyn H.

I shared this resource with my students

Carmen M.

It has helped me find resources for my students

Carema M.

Helped me become a better teacher by offering a variety of resources to keep them engaged!

Caitlin C.

CK 12 was useful as I could download the text books for use with me students. Now I cannot do that anymore. Congratulations on your 10'th anniversary, you have gone from useful to useless for me.

C Smith

Comments from Students

It has help me get better at science

Dante

I found CK-12 when I couldn't find the answers for my homework. Best thing that could have happened, even if my teacher introduced me to it in a later time. The content is amazing! It's helped alot throught the school semester.

Daphne

this program helped me that education is important.

Danny B.

It helped me understand how to work with ratios.

Dannete R.

helping me with my work when i mostly needed it,, Thanks so much.

Danielle

Congrats CK12! I have only started using it, but it has helped me greatly. Keep up the wonderful work.

Daniel C.

this website gives you great help in math and science

Angelea P.

It has helped me learn different concepts of Earth Science.

Daniel C.

In the past, ck-12 has been a trustworthy and colorful resource that I could always rely on if I was struggling with a concept in class. In geometry this year, we're actually required to use it, and it certainly helps me to learn concepts well.

Cam

It has given me the chance to learn more about what I need. #CK-12 is awesome.

Cam H.