Testimonials

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

CK-12 Digital FlexBooks® Allow You to Customize Curriculum
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CK-12 Digital FlexBooks® Allow You to Customize Curriculum
Save Hundreds of Pages Unneeded Textbooks with CK-12
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Save Hundreds of Pages Unneeded Textbooks with CK-12
Incorporating Current Events into a CK-12 FlexBook® the Next Day
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Incorporating Current Events into a CK-12 FlexBook® the Next Day
CK-12 Content to Match the Right Level
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CK-12 Content to Match the Right Level
CK-12 Meets and Exceeds Standards Requirements
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CK-12 Meets and Exceeds Standards Requirements
CK-12 FlexBooks® as Primary Resource in Algebra One Class
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CK-12 FlexBooks® as Primary Resource in Algebra One Class
Sharing CK-12 with Google Classroom and More
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Sharing CK-12 with Google Classroom and More
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 Fuels a Greater Learning Experience
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CK-12 Fuels a Greater Learning Experience
CK-12 Offers Support for All Students and Teachers Worldwide
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CK-12 Offers Support for All Students and Teachers Worldwide
Use CK-12 FlexBooks® to Replace Traditional Textbooks
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Use CK-12 FlexBooks® to Replace Traditional Textbooks
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

Comments from Educators

school

Fatima A.

Assistance with after school program

Farae

sience

Faith A.

Instructional texts for students to learn curriculum standards

F Woodall

Thanks for all the content assistance!

Eve S.

Very good resources and excellent lessons.

Erington

Great resources to support MYP curriculum without textbooks

Erin

It has helped me with the additional resources available. They are very useful.

Emma A.

its helps me get better and learn new resources

Eric S.

I have relied on CK-12 for simulators to help my students understand topics that are not able to be done easily in the classroom and has helped them to learn and also saved the school money!! Thank you and happy anniversary!!

Ericka O.

lesson plan for the topic mendel's law of inheritance

Eric C.

Send Geometry support materials

Emmanuel N.

Access to awesome texts for my students!

Emma

I love using the free resources as a literacy component in my science classroom. Many topics that I teach can be found at Ck-12 and the content is both accurate and engaging!

Emily I.

I began homeschooling and immediately went into panic mode, but after another homeschooling mother recommended this site I was immediately put at ease.

Elizabeth S.

I have used articles on a variety of Science topics with students to enhance their understanding

Ela B.

CK-12 has helped me by providing resources to support and reinforce lessons for my middle school students

Elaine H.

As a teacher it provides a resource for my students they may not have thought about. I look forward to seeing what it has to offer.

Ed

ck-12 is an amazing resource that provides up to date information that I can use to supplement our science textbooks. It also has leveled activities which helps when differentiating instruction. Keep up the great work!

Donna N.

I am a first-year chemistry teacher in an under-funded charter school. Our books are almost 10 years old and our lab doesn't have a complete stock. While searching to remedy some of these challenges, I stumbled upon CK-12 which offers a solution to a semi-outdated text and no online option for students who have grown up in the technology age. Thank you for allowing me to add your site as a resource and have options for useful tools to teach my students. Your site helps to make me a better teacher.

Dr K

Comments from Students

CK12 is the best online learning source ever.

Mason Ramos

Hi. it works a lot espically in school to help me understand things to help me proceed in life.

Naomi

CK-12 helped me with the water cycle and many other things, too.

Sean

Ck-12 helped me understand cell structure.

Mattea

this has helped me throughout my science grade. SO THANK YOU!!!!!!!

Careena

It helped me with astronomy

Natalia

Thank you for providing your resources in my Chemistry class. I have learned a lot from your texts. I learned about how ionic and ternary compounds bond together.

Tony Maggio

It has helped me through math a lot. Plus it got me a few extra points in my math grade

Toran Daylee Brown

its helped me so much, like sooooooo much, hmu ;0

Bethany Rimmer

i guess its easy to do work on the go now

Halen Willoughby

your videos and lessons helped me a lot. thank you so much . keep up the great work!!!!!!!

Imali

I love it! Thanks sooooo very much! A GREAT alternative resource from the traditional textbook.

Venise Borum

CK-12 has helped me by finding anything that needed for me to succeed in school.

Toma

It is has helped me learn a lot more about Science it is So Amazing I love it so much my 7th Grade teacher also uses it a lot.. when we talk about earth science and other things.....

Fatima

its helped me learn a lot about science. and i didn't know a lot of things i know now today! HAPPY ANNIVERSARY!!!!

Maegan Jones

i didn't know what orbitals were until now thanks you

James

i just started but so far has been great

Mahalia Barnes

it helped me in my science class

Ja'Crispy

it helped me get better at math and helped me raise my math grade from a 45 to a 89

Faruk

Its a great website

Blake