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

Comments from Educators

This website has helped to design a customized website that addresses the specific content my students are covering.

Colleen K.

I am an elementary school teacher and this learning center has advanced my students so much. It is very helpful in the curriculum and overall is a great brain trainer for students k-12

Cindy M.

CK12 provides standards aligned digital text books, videos and activities I use while teaching.

Cindy E.

Excellent exercises and resources! Congratulations!

Cielo

Thanks for making your lessons available! It helps a lot as a supplement of my lesson.

Cicelia A.

It has helped me explain, through problems and text, basic concepts to my students.

Chuck N.

Awesome resource!!! Keep it free!! Keep up the excellent work!!

Christopher S.

I am so pleased with CK-12. The information is so great for all learning styles and types. The variability of the site allows for differentiation and diversity of learning. Thank you for everything thtat you have done and will do for my students.

Christopher M.

K-12 is still a new educational system here in the Philippines and its effectivity leads me to seek reliable resources and materials. And, indeed, CK-12 has answered my needs as an educator. Cheers, CK-12!

Christine

I have greatly appreciated the flex books and the connected practice sets! Those practice sets have been great help to my students that need just a little more time with material, and it saves me time from having to create more material resources myself!

Christine

Comments from Students

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.

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

Mark H.

I love the concise way that the open resource materials cut to the chase. I can focus more clearly using these materials.Thanks for creating them.

Mark C.

with my son's science project

Marianne

Integrate wonderful lessons that engage my students in middle school education

Marian R.

It has helped to develop engaging lesson plans

Maria L.

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

Maria

happy 10th anniversiry.

Margaret

Thanks so much for your resources. They have helped me in my Earth Science and Biology classes. I am a special education teacher who uses your article and other resources to help my class. Congratulations on celebrating 10 years!

Marguerite T.

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

Margaret B.