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

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

Joe

i love ck12! i can use it to work with my small asian and african children!

Jimmel

The CK flexbook has allowed our science department to have an up to date resource for most of our science classes. We have not had hardcopy text books for over 20 years.

Jim L.

It has been a great resource to use. I believe it benefits my students more than me, but it is certainly been a useful tool-resource.

Jim K.

CK-12 IS AMAZING! It deepened my child's knowledge and understanding involving geology, health, and much more! Thanks a bunch for always being there for my child when he most needed it.

Jewel

I use it with special education students to find articles at lower reading levels. I also post links to articles on google classroom for students to read to reinforce their learning from class.

Jessica D.

This is my first time at your website. I have demystified mathematics and looking to create and publish projects that enable students to become accountable for sense making to overcome previous barriers to progressive math studies to qualify with problem solving skills for 21st century careers from math-based STEM field curriculums for starting salaries of $60,000.

Jerry R.

GIVES READING ACTIVITIES TO KIDS

Jenny B.

Providing great resources for my homeschooling needs

Jenny

cK-12 is a wonderful resource. I am a middle grades science teacher and have enjoyed this resource on a weekly basis.

Jennifer R.

Congratulations! You have done good work and helped many in their education journey. Interactive practices, instantly graded tests, and outlines and explanations, including videos and PLIXes, have helped me and my math students.

Jennifer T.

Amazing resources for my 5th grade class! Grateful for it!

Jennifer S.

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.

Looking for a better way to explain scale drawings and proportions to my special education students

Jennifer L.

It helped my son so much he is algebra 1 and is passing it very well

Jennifer D.

CK12 was a great resource for my middle school students because they were preloaded on their devices. Our internet connections were spotty at best in my classroom and CK12 provided a stable platform for me to teach and students to learn.

Jennifer

CK-12 has helped my chemistry students to understand course concepts better. Students enjoy the interactive tutorials: these online tutorials help to differentiate learning in a more engaging way. I LOVE using CK-12 in my science classes!

Jeff O.

lesson planning

Jeannie

Great resources, and learning sequences, available to students in school and at home. Thank you for your site it is invaluable

Jeannette M.

Happy Birthday

Jay

Comments from Students

you guys have helped me with learning new things

Betty

CK-12 helped me by teaching more stuff I haven't even learned in school yet!

Samuel Biersmith

CK-12 has helped my grades improve

Dakota

CK12 has helped me learn things my teacher and school can't provide.

Evelin

My teacher assigns work based off articles from your website and you always have clear answers in the readings so thanks for giving me easy 100's.

Jalyn Grace

cK-12 has helped me get through lots of class work and has helped me learn lots of things!

Maggie R.

You helped me look and learn about minerals and many more things. HAPPY ANNIVERSARY!

Candace

you have helped me in many ways during school hours by giving me a cite where i can study for test.

Natalie Mcginity

learned more than my teachers teach me!

Matt

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

Yolanda

you helped me with science grade

Faith

Helped me in social studies.

Paul Trumpore

Hi ck-12!!! congratulations!! Im one year older then you!! But....... you guys helped me get a A in science class and my teacher was very impress with my work I have. I just started when I first became a 6th grader, and I was pretty mad I had too start a new website. I always had gotten a D in science and I love science, so it hurt me to see I was failing. But I came home that day and my mom told me to do it any way, so I signed up and then BOOM!!! I fell in love with this website!! My teacher always told me that I needed some help with science, so I wold get on ck-12 and asked a helper for some help. My teacher always told me I could study more of a topic to get caught up with the other students, so I would hop on ck-12 and read,study,watch,and write down the topic. Since I started ck-12 I have an A in science,I have honor roll, and help other kids with science too!! So now that I am almost finished, congrats on having your 10th birthday!! Without you guys I dont know were I would be.Happy birthday!!! -Jasmine Whitfield-

Jasmine Whitfield

AMAZING FACTS AND MINI LESSON CONGRATES

Billy

Thanks or helping with my homework!

Jordan Bakar

hi there. Thank you for helping me learn.

Halley

u help me improve in all my subjects in school

Seth

Ck-12 has primarily helped with science in certain ways and im glad it still exists today

Daden

It helped me study for my science mid term exam.Thanks to ck12 I have got a full 100 on my science mid-term! Thank you ck12!

Vinnie

It has helped me with all subjects over the past 1 to 2 years.

Samarj Clifton