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 Material Unavailable By Traditional Publishers
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CK-12 Offers Material Unavailable By Traditional Publishers
Every time I open CK-12 There Is Something New and Engaging
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Every time I open CK-12 There Is Something New and Engaging
Start Small or Dive Right In with CK-12
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Start Small or Dive Right In with CK-12
CK-12 FlexBooks® as Primary Resource in Algebra One Class
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CK-12 FlexBooks® as Primary Resource in Algebra One Class
Continue Learning After the Lesson is Over with CK-12
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Continue Learning After the Lesson is Over with CK-12
CK-12's Adaptive Practice Allows You to Identify Where Each Students' Gaps Are
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CK-12's Adaptive Practice Allows You to Identify Where Each Students' Gaps Are
Confidence in Connecting to Standards with CK-12
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Confidence in Connecting to Standards with CK-12
Easy to Update and Modernize Content with CK-12
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Easy to Update and Modernize Content with CK-12
Illustrations Come to Life with CK-12
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Illustrations Come to Life with CK-12
Easily Share Content with other Districts and Teachers with CK-12
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Easily Share Content with other Districts and Teachers with CK-12
CK-12 Has Revolutionized How I Teach
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CK-12 Has Revolutionized How I Teach

Comments from Educators

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

Jason W.

It has helped me support my students with on so many levels.

Jason P.

CK-12 has become a weekly extension activity for my middle school science students.

Jason B.

classroom assignments for Night by Elie Weisel

Janet R.

You have flex books which have been a great tool for my students to read and watch videoclips on Ecology. I look forward to using your flex books on Evolution.

Janet G.

Provides plenty of well structured lessons

Janet

CK12 is a fantastic FREE resource that is comprehensive and engaging. I want my students to learn to look up information and use Internet resources and CK12 provides the opportunity for them to look things up without my help. The readings are clear and I

Jan

The plix and other resources have been very helpful in allowing me to address different types of learners.

James S.

I am using CK-12 in both my chemistry and physics classes this year which is my 37th year in teaching. When I tell people I use CK12 to make customizable free electronic textbooks, people are very surprised that it is possible.

James P.

What a great resource. The flex books are excellent by themselves , but with the ability to edit them, they are fantastic. I especially appreciate the differentiated levels of the flex books. I use the middle school book for my 8th grade prep students

James G.

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.