Testimonials

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

CK-12 Helps to Address Learning Gaps
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CK-12 Helps to Address Learning Gaps
CK-12 Offers Resources Students Understand
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CK-12 Offers Resources Students Understand
Embedding Videos in CK-12 to Enhance Student Understanding
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Embedding Videos in CK-12 to Enhance Student Understanding
Easy to Update and Modernize Content with CK-12
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Easy to Update and Modernize Content with CK-12
CK-12 Makes Differentiated Learning Come to Life
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CK-12 Makes Differentiated Learning Come to Life
CK-12 Keeps Your Students Engaged
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CK-12 Keeps Your Students Engaged
CK-12 Offers Material Unavailable By Traditional Publishers
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CK-12 Offers Material Unavailable By Traditional Publishers
CK-12 Meets Every Student's Needs
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CK-12 Meets Every Student's Needs
Confidence in Connecting to Standards with CK-12
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Confidence in Connecting to Standards with CK-12
It's Worth Transitioning from Traditional Textbooks to CK-12 FlexBooks®
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It's Worth Transitioning from Traditional Textbooks to CK-12 FlexBooks®
CK-12 Has Revolutionized How I Teach
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CK-12 Has Revolutionized How I Teach
Using CK-12 Every Day in Class
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Using CK-12 Every Day in Class

Comments from Educators

CK-12 has provided our school with free science texts and has given my students the opportunity to publish their writing online in the Understanding Biodiversity book. Thank you!

Amy H.

helped me learn how to do my math better

Brady

Absolutely an amazing experience. I love that I can customize the textbooks to include what I believe is relevant in the order that I feel is a good flow. Thank you for saving my district so much money!

Jason W.

with lessons for the 1st grade classroom

Loralei B.

ck12 has help me by making me study even harder i am really excited that i am using ck12 and i would give you all a congradulations your 10th anniversary you did work hard for this

Gabriela C.

This is my first time at your website. I have demystified mathematics and looking to create and publish projects that enable students to become accountable for sense making to overcome previous barriers to progressive math studies to qualify with problem solving skills for 21st century careers from math-based STEM field curriculums for starting salaries of $60,000.

Jerry R.

NOT AT ALL

Gracie

many teaching resources are getting this site for me

Jaleesa

I have been able to take the real world applications and interesting topics from ck-12 and incorporate them into my science lessons.

Lauren H.

It's a very fun and interactive way to teach and sum up the boring information teachers repeat again and again.

Joe M.

I have used parts and all of many lesson plans. Thanks.

Cathryn B.

I am a high school biology and chemistry teacher. I assign ck-12 as a resource for students who struggle with concepts. I love the Real Life articles. The students get to understand why science is important. Thank you

Laura S.

I have greatly appreciated the flex books and the connected practice sets! Those practice sets have been great help to my students that need just a little more time with material, and it saves me time from having to create more material resources myself!

Christine

I have used the lessons to help my ELL's, for introducing lessons, for tutoring, and for enriching my lessons. Thank you!!!

Fernanda S.

CK-12 has helped my students access current science content as we implement the Next Generation Science Standards.

Barbara W.

Provides plenty of well structured lessons

Janet

You have helped my teachers by provided a large and reliable source of information for them, as well as a cite that their students can go on and explore. In turn, that helps me.

Alyssa

I am a special education teacher, I use information to help kids understand concepts in the biology class.

Jason V.

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