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

Very good resources and excellent lessons.

Erington

Great resources to support MYP curriculum without textbooks

Erin

I have relied on CK-12 for simulators to help my students understand topics that are not able to be done easily in the classroom and has helped them to learn and also saved the school money!! Thank you and happy anniversary!!

Ericka O.

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

Emma

its helps me get better and learn new resources

Eric S.

lesson plan for the topic mendel's law of inheritance

Eric C.

Send Geometry support materials

Emmanuel N.

Access to awesome texts for my students!

Emma

I love using the free resources as a literacy component in my science classroom. Many topics that I teach can be found at Ck-12 and the content is both accurate and engaging!

Emily I.

I began homeschooling and immediately went into panic mode, but after another homeschooling mother recommended this site I was immediately put at ease.

Elizabeth S.

Comments from Students

I really like the many ways of learning content. The practice, videos and articles are so current and valid.

Stephen

Thank sfor great lessons in Science and History.

K. Pinnell's first name is Irene.

it helped me learn new things but plese make the stories less boring

Julian M.

You have helped me study, saved my science project and make my life easier. i can't wait to see you grow bigger and better but lose side that you got to be fun and interactive.

Julia H.

cK-12 has amazing textbooks with really helpful questions that help you understand what you are reading. I also really like the little quizzes because they help me learn some of the tougher concepts. The quizzes will review and review the question I'm stuck on and I find that extremely helpful.

Julia

this program has helped me in so many ways. i am so grateful that i can be a part of this program! it has allowed me to be able to stay home and take my time on my schooling. i love how each lesson takes about 30 minutes to an hour so i am able to get ahe

Julia

This website helped me to get a 113 percent on my science test, raising my average to a 105

Jude J.

it has helped me with physical science class

Julia

ck-12 helped me pass test

Jubilee

It made me become smart for once. First my mind was a tadpole but it grew up to a cool frog. I thank my mind and you for this to making dreams work

Juan A.