Testimonials

See the opinions of students and educators just like you. Select from the following to learn more.

CK-12 is Adjustable to Each Student's Level of Learning
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CK-12 is Adjustable to Each Student's Level of Learning
Students Love CK-12 Study Guides
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Students Love CK-12 Study Guides
CK-12 PLIX Makes it Very Easy for Teachers With Very Little Prep Time
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CK-12 PLIX Makes it Very Easy for Teachers With Very Little Prep Time
Personalizing and Blending Learning with CK-12
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Personalizing and Blending Learning with CK-12
CK-12 Meets Every Student's Needs
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CK-12 Meets Every Student's Needs
EPISD Saw Results After One Year of CK-12 FlexBooks®
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EPISD Saw Results After One Year of CK-12 FlexBooks®
CK-12 Offers Support for All Students and Teachers Worldwide
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CK-12 Offers Support for All Students and Teachers Worldwide
Be a Champion Educator with CK-12
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Be a Champion Educator with CK-12
Using CK-12 Modalities to Bring Learning to Life
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Using CK-12 Modalities to Bring Learning to Life
CK-12 Keeps Your Students Engaged
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CK-12 Keeps Your Students Engaged
CK-12 Fuels a Greater Learning Experience
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CK-12 Fuels a Greater Learning Experience
CK-12 Availability: No More Excuses
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CK-12 Availability: No More Excuses

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

CK-12 has helped me provide online resources for my special education students to access at home!

Lurleen M.

i have used ck-12 while home educating my children via google apps

Luna F.

CK-12 has been a wonderful resource for my students. I love how there are readings and multi-modal methods of having students explore topics.

Luanne

This resource has been invaluable to me. I can use it for remediation and acceleration. Thank you.

Louise P.

I was able to create worksheet practice for my students.The videos available were also helpful in helping students review concepts

Lotoya G.

This has been an excellent resource for my class room. Our students do not have take home text books since we are a Title 1 school and money is limited. I have used this as a resource for homework and differentiation using your different workbooks. I have also used it as a large group presentation of a topic and then practiced using materials linked. I have also created several "webquest" type activities for use in our computer lab. Thanks for all of the hard work that went into this and I would love to see Social Studies/World/American history as fleshed out as the science is! Loved it!

Lorre C.

I work at a Stem High School - Hudson Valley P-Tech in NY. Our mission is to connect math to the real world for our students. I liked your distance formula lesson and right now I am looking at your amplitude, Freq & period info. Keep up the good work!!

Lorraine N.

cK-12 helped by providing challenging and interesting activities to supplement classroom learning

Lorenza B.

with lessons for the 1st grade classroom

Loralei B.

cK-12 has been very helpful in providing short assessments that I use as homework, bell-ringers, and exit- slip activities in Science!!!!!

LJ B.