Testimonials

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

Let Your Students Explore with CK-12!
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Let Your Students Explore with CK-12!
Using CK-12 Every Day in Class
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Using CK-12 Every Day in Class
Instantly See CK-12 Content in More Than 90 Languages
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Instantly See CK-12 Content in More Than 90 Languages
Customizing CK-12 with Regional Content
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Customizing CK-12 with Regional Content
Save Money and Own Your Standards with CK-12
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Save Money and Own Your Standards with CK-12
Sharing CK-12 with Google Classroom and More
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Sharing CK-12 with Google Classroom and More
Why Teachers Love CK-12 FlexBooks®
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Why Teachers Love CK-12 FlexBooks®
CK-12's Free, Platform-Agnostic System for Finding and Editing OER Content
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CK-12's Free, Platform-Agnostic System for Finding and Editing OER Content
CK-12's PLIX and Interactives Help Students to Work Together
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CK-12's PLIX and Interactives Help Students to Work Together
CK-12 Made My Job Easier!
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CK-12 Made My Job Easier!
"I Use CK-12 Videos Whenever Possible"
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"I Use CK-12 Videos Whenever Possible"
CK-12 Meets and Exceeds Standards Requirements
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CK-12 Meets and Exceeds Standards Requirements

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

cK-12 has helped me understand more about my biology class. It provides my teacher easier ways to do fun and competitive quiz's.It provides a bundle of notes that are very easy to access and you can make your own highlighting marks and notes. Thanks!!

Arianna V.

I haven't been on here yet but my teacher showed me today and it lokks pretty cool and its very fun we did a quiz on seasons

Arianna

cK-12 is helping me the pass my FTCE test, which i want to take next month.I don't have the money to buy the book, so i am greatful for the help,

Ann M.

Helped me become a faster & well skilled learner.

Andy R.

cK-12 has been of immense help to me. I used to satisfy my hunger for knowledge through books only. One day I came across this wonderful app which has pacified my hunger. Thank you!

Ankit C.

ck-12 helped me by supporting myself and for trying my best

Anjel B.

Ck-12 has always been my study buddy. I like the fact that there is more than one way to learn about something rather than sticking to a typical lecture or textbook. It lets me explore new concepts.

Anjali

It gives me information to help with classwork and homework.

Aniyah

it has helped me by giving me good answer advice

Aniyah

it help me with science and helped me get my grade up by teaching me my lesson and letting me look over the words just like quizlet

Aniya S.