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

This website has helped to design a customized website that addresses the specific content my students are covering.

Colleen K.

I am an elementary school teacher and this learning center has advanced my students so much. It is very helpful in the curriculum and overall is a great brain trainer for students k-12

Cindy M.

CK12 provides standards aligned digital text books, videos and activities I use while teaching.

Cindy E.

Excellent exercises and resources! Congratulations!

Cielo

Thanks for making your lessons available! It helps a lot as a supplement of my lesson.

Cicelia A.

It has helped me explain, through problems and text, basic concepts to my students.

Chuck N.

Awesome resource!!! Keep it free!! Keep up the excellent work!!

Christopher S.

I am so pleased with CK-12. The information is so great for all learning styles and types. The variability of the site allows for differentiation and diversity of learning. Thank you for everything thtat you have done and will do for my students.

Christopher M.

K-12 is still a new educational system here in the Philippines and its effectivity leads me to seek reliable resources and materials. And, indeed, CK-12 has answered my needs as an educator. Cheers, CK-12!

Christine

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

Comments from Students

cK-12 HAVE HELPED US BY HAVING GREAT RESOURCES AND LEARNING DIFFERENT WAYS TO TO DO THINGS. thank u for your wonderful time and effort Happy Anniversary

Rosemary F.

cK-12 has helped me whenever I need a question answered there right there to help

Rose H.

Thank you for helping me learn. Your practice and articles has helped me.

Rose

ck12 has helped me a lot with math thanks a lot:3

Ronnie

It helped me in science class

Roger

ck-12 has helped me with my multiplication, division, and Ela.

Roger W.

It helped me with note taking in bio class

Rocco I.

It helped me to improve on my test and other assignments

Rochelle S.

how to know when a triangle is obtuse,right or acute

Roberto M.

Often times I struggled finding answers or a good way to study. I asked my teacher how I could improve my studying skills, and she suggested me cK-12. Amazing website, congratulations.

Roberto C.