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 two children. One is 10 and the other 7 and they both are getting better with math as the semesters go by. Thank you for makimg this site free.

Chantely B.

well I am impressed by the high quality of the material, best of all, free to use. Keep up the good work!

Cesar R.

I love the helpful video links within the textbook and the integrated practice problems for the students

Cathy C.

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

Cathryn B.

Providing guided resources for teaching Earth Science. I class that I only recently began teaching was incredibly beneficial

Cassy B.

It has given my students wonderful lessons!

Carolyn H.

I shared this resource with my students

Carmen M.

It has helped me find resources for my students

Carema M.

Helped me become a better teacher by offering a variety of resources to keep them engaged!

Caitlin C.

CK 12 was useful as I could download the text books for use with me students. Now I cannot do that anymore. Congratulations on your 10'th anniversary, you have gone from useful to useless for me.

C Smith

Comments from Students

I am a Science Olympiad coach for Anatomy and Physiology at a middle school. This is our first year as a team, so I have spent hours searching for materials. Your site offers just what we need.

Kippi F.

kindly email a lesson plan for Angles forms by intersecting secants.

Kimberlee

Finding material for my chemistry students, and also creating my own online text.

Kim W.

I use Ck-12 to find resources for my high school Significant Support Needs class.

Kim C.

CK-12 has revolutionized they way I work with students. I am most especially grateful because it allows me to work with students who are distance learners.

Kim

This program help my students show growth on computer test.

Kevin W.

CK-12 has been a life saver. As a homeschool mom with multiple children on a very limited budget, any free resources that I can utilize means so much to me. The great thing about CK-12 is not just the free aspect but the quality is just as important as well! Thank you to everyone involved with CK-12!

Kia B.

ck-12 has helped me immensely regarding my preparation for the tasc ged. Thank you so much for this excellent educational website !

Kevin N.

I want to prepare my students to take and score high on standardize tests.

Kent T.

Its fantastically helpful. My students LOVE ITTT!!!!!

Kent R.