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

CK-12 is off thee chart! I love using this tool in my chemistry classroom because it brings in a variety of perspectives and does progressive testing. A great tool for getting them ready for what NGSS is bringing down the pipeline.

Kelly M.

I use CK12 all the time in my science classes! It is a great summary of all the content, its in one location, and has all the media extras that keep students engaged. They really prefer CK12 to old school textbook assignments. I am teaching a marine scien

Kelli H.

ck-12 helped me to build my lesson plans.

kaur

I love the interactive links in the e-book. I have used the resource for reviews and absent students.

Katy W.

Tutoring!

Katie A.

It's my first year in a new school, with a completely different curriculum structure than I'm used to teaching in biology, and my class did not come with any textbooks! For the first 2 months of school I would spend countless hours trying to combine diffe

Kathryn S.

I love cK12! I have used it in my high school science classes for 4 years now. I love how well the readings coordinate with the interactives and I love how I can integrate it into my Edmodo class pages as well. I REALLY love how I can find the same topic at different reading levels and in Spanish so that I can make sure every one of my students can learn science content and themes at any skill level.

Katie

It has helped my students learn

Kathryn

CK-12 has provided relevant reaading material for my students... don't know what our school would do without your support

Kathleen L.

We frequently use copies of the content to send with students who are suspended, sick or otherwise unable to attend class. It's saved many headaches when trying to find material for these students.

Kathleen N.

Comments from Students

CK-12 Helped me study for science tests that were on subject I had trouble with. Thanks CK-12!!!

Keegan

i learned that some things are grose but it was fun at times doing it with my mom and brother o ya the dog to she would hog the couch

Patrick M.

You guys helped me in so many numerous ways with my education even though I am a college student! This website I believe crosses the barrier to be able to teach anyone from any grade level and that says a lot!

Kaylor D.

CK-12 has helped me with Integrated Science!!

Kayley P.

Thank you for being an awesome site! You've helped a lot of people!

Katelyn

CK-12 has helped me be connected to my chemistry class and learn information through examples and pictures when my teacher is not around.

Kat

Hi! I wanted to thank the ck-12 team for helping me throughout my years in both middle and high school. I've been using ck-12 for many years and have to say it's one of the best programs out there! Thank you so much for making ck-12 possible!

Katelin

Ck-12 has helped me to achieve my work and happy anniversery CK-12!

Kat

CK-12 helps me learn about science

Kassie

it helps me learn about energy

Kadajah J.