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

wonderful resource for my homeschoolers

Easton

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 M.

Thanks for the science and math content

Donna H.

ck12.org has been a great find! Free, quality on-line textbooks that can be customized as desired. PLUS on-line 'instant' quizzes that provide feedback and links to my LMS - a true TREASURE! Congrats on 10 Years!!!

Donna E.

CK-12 has helped liberate my classes from a traditional textbook. Now my students can read the content they need at their own level.

Donald K.

I have been able to use CK12 to allow my homeschooled student to explore and expand on concepts we have studied in greater depth.

Donna A.

CK-12 provides great mini lessons, which can be used as Bell Ringers or introductions to lessons.

Donna

by helping kids who need tutoring at home

Dolores C.

It is helping us in our Catholic school System in the Diocese of Gbarnga, Liberia- West Africa

Dominic C.

when students need home tutoring

Dolores

My students love CK-12's Braingenie, and I do too. This is my 2nd year using Braingenie, and I have helped several other teachers become acquainted with it too. I especially love that I can create the goals for my students and then track their progress through the reports.

Denise T.

CK-12 has given my kids a great foundation of knowledge in the subject they are studying, while allowing me the opportunity to add additional information and videos if needed.

Denise R.

I would like to have access to the webinar to use some of the 3-5 resources. I liked the tremendous amount of activities I can use with my fourth grade class.

Denise H.

I love the webinars; they helped me get my classes set up in ck-12 and helped me create my own textbook. Although I publish my own workbook I often assign extra practice for the students on ck-12.

Deb M.

As a homeschooling mom, it's always a struggle to find comprehensive material that is logical and easy to understand. That is not guaranteed even when money is spent. This is science based with great links and supportive data.

DeeDee

Great resource for students and teachers

Dawn R.

Thank you so much for your textbooks & question banks! The questions have provided a quick and easy way for me to give developmental assessments! Thanks for all you do, and I can't wait to see what more you have in store for this year!!

David T.

Hi people from CK-12! First and foremost, Happy 10th Anniversary! You've really helped my science class by giving us great information and FREE learning textbooks! You truly were a godsend to my teachers here at school. Thank you so much creating this web

Davina

CK-12 is a great way for home-schooling.

David

It's helping my classroom with our space facts....

Dathian T.

Comments from Students

CK-12 has been incredible in providing me with information for my biology projects.

Abdullah Alikhan

It helped me with my math and science i got an A+ on my semester exam

Iysis

It help me learn how to turn fractions into decimals

Adriana

just found this random website because i was searching for places with convergent oceanic-oceanic plate boundaries

William

CK-12 has helped me with my homework and things i did not understand. Thankyou

Dajah

Always help me do my lessons with articles about the topic im learning about. Thanks for taking your time and making it all free.

Peter

It boosted me through a lot of math stuff.

Eliott

It has me very much from helping me with science class to improving my knowledge on science and chemistry. I thank who ever has invented this wonderful site and congratulate you on the 10 years you have had this site.

Kaitlyn Davidson

Math is a universal language one, that we don't fully understand, or I feel being taught properly in schools. Thanks to Ck-12, I am able to bridge the gaps in my knowledge regarding basic math concepts and move on to more advanced topic. Thank you for b

Wensley

When I have problems in science, cK-12 is there to help.

Alan Mao

Has provided needed resources and provided us with ideas.

Patricia Aguirre

I have been having problem with solving my algerbra problems

Tracy Robinson

I have been learning a lot from ck-12!!!!!

Veer Sanghavi

Learning Algebra

Elizabeth

ck-12 has helped me prepare for my return to college.

Tony Thompson

Learning new information.

Candice Sabrya Medley

This site has helped me learn about new and different things that I hadn't known before! So, thank you!

Maeve

its dope

James E

You have helped me become a better student.

Kaitlyn D

Helped me get good grades and get better at Biology

Tom