Testimonials

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

CK-12 Digital FlexBooks® Allow You to Customize Curriculum
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CK-12 Digital FlexBooks® Allow You to Customize Curriculum
Save Hundreds of Pages Unneeded Textbooks with CK-12
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Save Hundreds of Pages Unneeded Textbooks with CK-12
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 Content to Match the Right Level
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CK-12 Content to Match the Right Level
CK-12 Meets and Exceeds Standards Requirements
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CK-12 Meets and Exceeds Standards Requirements
CK-12 FlexBooks® as Primary Resource in Algebra One Class
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CK-12 FlexBooks® as Primary Resource in Algebra One Class
Sharing CK-12 with Google Classroom and More
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Sharing CK-12 with Google Classroom and More
Continue Learning After the Lesson is Over with CK-12
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Continue Learning After the Lesson is Over with CK-12
CK-12 Fuels a Greater Learning Experience
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CK-12 Fuels a Greater Learning Experience
CK-12 Offers Support for All Students and Teachers Worldwide
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CK-12 Offers Support for All Students and Teachers Worldwide
Use CK-12 FlexBooks® to Replace Traditional Textbooks
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Use CK-12 FlexBooks® to Replace Traditional Textbooks
Easily Share Content with other Districts and Teachers with CK-12
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Easily Share Content with other Districts and Teachers with CK-12

Comments from Educators

The website is great and rich; wonderful resources. My students demand work from the platform and they love the adaptive practice and quizzes. Thank you.

Felix B.

What a great resource. The flex books are excellent by themselves , but with the ability to edit them, they are fantastic. I especially appreciate the differentiated levels of the flex books. I use the middle school book for my 8th grade prep students

James G.

CK 12 is a great resource to use both in the classroom and for homework. The links to the Canvas platform are very advantageous to me and cut my grading time in half.

John R.

I enjoyed using cK-12. I is a good website for biology. I recommend it to any teacher or student dealing with biology. It is very easy to use, covers all topics in biology in the utmost simple and fulfilling way.

Ahmed E.

Simply put " You guys made my life easier!!!"

Gopalakrishnan R.

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

Colleen K.

love the worksheets

Marcie C.

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

Lurleen M.

Awesome resource used for student teaching.

Ann

plan lessons

Artemis B.

Getting new resources is always a struggle. Our district has really been focusing on technology. New teaching materials hasn't been high on the list. Thanks to CK-12 I have the text resource that I need being used in a way my students enjoy!

Angenette S.

I use it during my lectures for Introductory Physics courses at the university. Helps reinforcing ideas and visualize sometimes quite complicated concepts.

Ania

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

Mark H.

I like to have well rounded lessons and your lessons are easy to use on the iPad.

Karen S.

It brings new ideas and learning strategies to the table.

Faith W.

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.

it helps me find fun, well thought out lessons for my students.

Alli

It has helped me with the additional resources available. They are very useful.

Emma A.

Comments from Students

This website helped me in every way possible. Will honestly use this

Abby A

Looking to find a great inquiry lesson on polarity...thank you!

Seun Anderson

it help me with a lot of stuff that i thought i coulden't do myself

Dameon

Ck-12 has helped me learn about science

Aiden Nelson

CK-12 has helped me with my homework and things i did not understand. Thankyou

Dajah

Got me to understand global warming

Ivan

Very helpful gave me a lot of information that i need in my study

Wiam Alqaderi

It has improved me thank you so much for this site

Gabrielle Glorianna Bobo

cK12 has helped me understand the concepts my textbook teaches me in a more creative way. I like the pictures and comparisons that are given when explaining something.

Camile Ingram

u help me improve in all my subjects in school

Seth

Thank you for the help! They have helped me so much with my math classes and I know they will continue! Thank you cK-12

Zori D.

CK-12 has helped me breeze through geometry in a private school which did not offer the class. The ability to do everything on my own gave my teacher the time he needed to teach his other classes and helped me earn my high school credit for when I advance

James Rochon

THANKS. Its helped med study for important tests, and its been a really helpful resource for me.

Jorge

It helps me learn stuff i didnt know.

Dallon Spendlove

Help me a lot Thanks!!!!!

Yoselin

Wow! Fantastic site. It is really help to us. Hands Up to you effective work.

Maha

it has educated me very well , and helped me get into the the 9th grade.

Late'Ya Matthews

CK-12 has helped me understand math and science more.

Alanis Lopez