Testimonials

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

The Awesome Ability to Update CK-12 FlexBooks®
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The Awesome Ability to Update CK-12 FlexBooks®
Curating CK-12 FlexBooks® for Relevance and Engagement
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Curating CK-12 FlexBooks® for Relevance and Engagement
Using CK-12's Platform to Deliver Instruction on Devices
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Using CK-12's Platform to Deliver Instruction on Devices
Instantly See CK-12 Content in More Than 90 Languages
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Instantly See CK-12 Content in More Than 90 Languages
Using CK-12 in a Large School District
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Using CK-12 in a Large School District
CK-12 Simulations Connect Classroom with Real World Situations
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CK-12 Simulations Connect Classroom with Real World Situations
Student Engagement: Working Independently Using CK-12
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Student Engagement: Working Independently Using CK-12
Parents Love CK-12
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Parents Love CK-12
Personalizing and Blending Learning with CK-12
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Personalizing and Blending Learning with CK-12
CK-12 Is My Go-To Source for Classroom Material
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CK-12 Is My Go-To Source for Classroom Material
Illustrations Come to Life with CK-12
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Illustrations Come to Life with CK-12
CK-12 is User-Friendly and Fits Each School's Style
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CK-12 is User-Friendly and Fits Each School's Style

Comments from Educators

I am sincerely grateful to anyone out there who takes the time to provide kids with an education when they wouldn't have been able to get it in another way. CK-12 has definitely been a very helpful site, one that is fun, motivational, and most importantly

Alexis

CK-12 makes my life easier in terms of extra activities for my students to reinforce what is being discovered in Science.

Álvaro E.

I have improved the labs for my online physical science class.

Beth R.

You helped my kids love learning again! I've been homeschooling for 5 years and we just found your site last year and it's been amazing thus far! Thank you for all you do to help educate our children!

Amber A.

I value cK-12 as a resource. I am a middle school science teacher and use cK-12's website on a weekly basis.

Jennifer W.

Ck-12 is amazing. My students love the worksheets!

Joe

Live saver! Ck-12 has been a wonderful resource for me since I am teaching a curriculum that I have not taught before. Great asset.

Belinda C.

CK-12 has helped me get text into the students hands

Grant R.

CK-12 is an amazing resource to teach my students! I love that I can collage material and personalize material to suite each of my classes. Thank you for all that you've done and please keep up the great work!

Arpit

when students need home tutoring

Dolores

by helping kids who need tutoring at home

Dolores C.

sience

Faith A.

I've been working with a student who is preparing to take a nursing exam. It it difficult to find a single website that combines all the subjects on the exam - CK-12 is one of the few and definitely the most comprehensive. The breadth of content on CK-12 is remarkable. The material is almost always of a very high quality. I'm happy to have discovered the site and will continue to incorporate its resources into my future teaching.

John P.

CK-12 has helped me develop lessons that are interactive and present the material in a fun way. THANK YOU!

Holly

I have no textbooks to use in my classroom not even old ones to use as reference material for the students. Part of the educational standards is for students to be able to read content at grade level. How do you do this without books? CK12.org has been the provider of books and practice material. I am using it in all of my science classes except for AP Physics as those students are required to purchase a college textbook. Thank you CK12! Without your support and online material my job would be extremely difficult. Congratulations on 10 years of educational support.

Cynthia A.

CK helps me on my practice teaching experiences

Ariane

CK-12 has provided relevant reaading material for my students... don't know what our school would do without your support

Kathleen L.

You Helps us to thrive! We want to say you thank you!

Andrew

Comments from Students

Thanks U very much for building up this wonderful platform for children who need help. I am devoting in a volunteer program and their children like CK very much!

Yesmine

Helped me get to 7th grade

Yesenia

tremendously helped my students to understand science concepts, and motivated to do homework

Yolanda

You made me get a 75 on a test

Im Mad

CK-12 has given me all the resources and information I need to succeed in my class; and excel in my learning!

Hailey Gough

Ck-12 has helped me a lot with science so I was wanting to challenge myself with 8th grade level.

Elliote Dinovo

You are awesome. Thank you.

Elizabeth Aguilar

cK12 helped me with biology and some other subjects. Keep up the good work. Happy 10 anniversary!!! I am going to keep on using this site for so much more.

Haleigh Dobson

i can now tell the difference between smooth,striated and cardiac muscles

Takalani

CK-12 helped me in very very many diverse ways!

Victoria Kim

CK-12 helped me with science

Sawyer

Helped me in social studies.

Paul Trumpore

Ck12 has helped me push myself to be passionate about chemistry. thank you.

Abby Kilpatrick

Breaking down material into digestible bites.

Tanika Reiss

It was AMAZING at helping me do my homework.

Aj E

CK-12 has helped me understand biology.

Kahrie Stegman

School has been rough, and some of these assignments my teachers have assigned me, is also hard, but ck12 is much easier to work with

Victoria

It has helped me find out more about molecules and cells along with animals and plants in my class and helped me to pass my tests and study.

Zoie