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

Thanks for providing free, high quality resources for kids and teachers! I love the flexible way that resources can be built.

Mark H.

with my son's science project

Marianne

In many instances, available resources are not sufficient to explain a particular problem, so it is a relief to be able to turn to cK-12 for help.

Marion N.

I use it for Credit Recovery Program. My students like it!

Maria

I am just starting to use Ck-12, so far it seems like a great resource for homeschooling my daughters.

Margaret B.

love the worksheets

Marcie C.

happy 10th anniversiry.

Margaret

The drill and practice has helped my son recognize which function a math problem requires.

Marc M.

to edcuate lower class student

Manish

video tutorials for lesson plans!

Macie M.

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.