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

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

Mark H.

with my son's science project

Marianne

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.

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

Maria

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

Margaret B.

love the worksheets

Marcie C.

happy 10th anniversiry.

Margaret

The drill and practice has helped my son recognize which function a math problem requires.

Marc M.

to edcuate lower class student

Manish

video tutorials for lesson plans!

Macie M.

Comments from Students

It has helped me to learn and understand Math better.

Caitlin

CK-12 has helped me in science a lot, i have learned a lot through the practices.

Calyn B.

Ive used this site for about 2 years now. It has helped me throughout my highschool years. Im in 10th rightnow but ill continue to use this site for all my biology classes and chemistry . Ive used this to get answers on my assignments. To to able to unde

Asia E.

It helped me learn more about the topic I was studying.

Ashton F.

they helped me be smarter

Ashley

it made science fun and easier to learn.

Artasia

Ck-12 has allowed me to not have to lug a textbook to and from school, and still get relevant and interesting information about science.

Arrin

Ck-12 has helped me keep up in class when I am having trouble and do homework that my teacher assigns us from the website, I don't know what I'd do without Ck-12.

Arlene V.

I always interested in learning new things. Even being a University student, I use CK-12 to keep learning.

Arif A.

this website is awesome i use it every day

Ariel