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 have no textbooks to use in my classroom not even old ones to use as reference material for the students. Part of the educational standards is for students to be able to read content at grade level. How do you do this without books? CK12.org has been the provider of books and practice material. I am using it in all of my science classes except for AP Physics as those students are required to purchase a college textbook. Thank you CK12! Without your support and online material my job would be extremely difficult. Congratulations on 10 years of educational support.

Cynthia B.

This website has awesome material to help my students to understand the world around them.

Cynthia

Ck-12 has brought science to life in my classroom with online videos, challenging reading and built in assessments to help my students know what they are learning.

Courtney M.

Making connections between real-life concepts and applications with students!

Cottey G.

I have used ck-12 science as my children's home school science curriculum for the past 2 years.

Cornella J.

kK-12 have helped me to find many activities and links to use in my class

Consuelo S.

given ability to work with multiple skill levels in one classroom

Corinna B.

I love to use ck12 on and off campus. and i love all the free resources

Cooper L.

I can barely remember how I used to teach with an old dusty textbook. I have kept those around, but now I use them in a special activity: I have students rip out pages to underscore the fact that science is constantly changing. Traditional text, especially in science, are obsolete before they even ship. Needless to say, they are also very expensive. I have also turned several colleagues onto CK12 and now your awesome products are used in several grades here.

Colin H.

I love your online book and resources! I have been using your online book with my middle school students for 3 years and I love it. Thank you for providing excellent materials for us.

Connie Jo E.

Comments from Students

I have chronic pain that doesn't allow me to go to school. I had a really hard time homeschooling until I found this website. CK-12 has helped me to be able to get an education until I am able to go back to school. Thank you.

Tya

CK-12 has helped me a lot. It has helped me understand certain subjects in science and much more. In my opinion CK-12 is one of the best educational websites there is.

Louis A.

Our school just gave each student a chromebook, making us 1:1 school. Only 1 of 2 in our district. Our school is Title one with many obstacles to overcome.

Trish P.

CK-12 has helped me with a lot of things such as science, reading, math and social studies. I like using CK-12 because it is extremely useful and I suggest you to try it out also.

Trinity

it had helped me learn things that i didn`t know in a way i can understand.

Trinity J.

You guys made it so i don't have to carry around an ungodly amount of textbooks. Thx.

Tanner W.

It has helped me get a better understanding on certain subjects.

Tanner M.

I don't understand why it works like this but, it is amazing so I like it but, I think it shouldn't have a login for the students the teachers should only have a login. I love this website it helps me with my learning a lot so, thank you and have a good y

Taniya H.

I love how I can go on here and see any information that I might need for a project pr lesson

Sunya A.

They helped me learn more about dividing fractions.

Susana C.