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

it helped me on a lot of stuff

Christianna

Great science content! Lots of resources; video, text, quizzes. Love the connectivity to Edmodo. Very helpful!

Christiana D.

ck12 has helped me by teaching me new things in algebra and learning more and more about daily math life

Christian D.

I first used the CK12.org webpage in conjunction with traditional style biology ibook four years ago after going to a technology training. Now I have open sourced a regular biology Flexboook and an honors Flexbook for use by our entire school and embedded

Chris J.

So fun for students. Used the Natural Selection mouse interactive as a Do Now, so great.

Cheryl

our lessons make my job so much easier. I can count on quality lessons from you and can use them to meet student accommodations. Thank you.

Chris E.

I can find problems that suitable for my grade 8 son.

Cherry P.

it was a good educational website

Chelsea

Wonderful simulations to enhance student understanding AND they work on the student iPads!

Chauncey H.

it help my student to have a better understanding on the specifc topic in the class discusion.

Charlin

Comments from Students

helped me learn about simple machines

Giselle

CK-12 has helped me with my work in science class and helped me understand how rolercosters work

Gillian

it has helped me by learning things that i don't know

Quagmire

you have helped me in science by letting me finish my work quicker

Mel

Excelente herramienta para fortalecer los temas vistos en clases..Sigan así C:

Gerardo

it has help me learn new thing and continue my growth in science

Francisco D.

ck-12 helped with my music career.

Gerard W.

This site has helped many of us to better understand the world around us. Without you cK-12 I dont think I would have never have understod the material better than I already know

Francisco

it has helped me to understand my subjects easier

francis

It has helped me learn phisics

Flannery C.