Testimonials

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

Why Teachers Love CK-12 FlexBooks®
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Why Teachers Love CK-12 FlexBooks®
Translate FlexBooks® with just One Click!
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Translate FlexBooks® with just One Click!
Save Money and Own Your Standards with CK-12
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Save Money and Own Your Standards with CK-12
It's "Very Easy" to Create CK-12 FlexBooks®
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It's "Very Easy" to Create CK-12 FlexBooks®
Many Reasons to Use CK-12 FlexBooks®
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Many Reasons to Use CK-12 FlexBooks®
CK-12 Made My Job Easier!
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CK-12 Made My Job Easier!
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
Using CK-12 PLIX and Interactives Creates More Participation in the Classroom
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Using CK-12 PLIX and Interactives Creates More Participation in the Classroom
CK-12's Key Role in the #GoOpen Movement
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CK-12's Key Role in the #GoOpen Movement
CK-12 Groups: A Great Experience for Students and Parents
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CK-12 Groups: A Great Experience for Students and Parents
Talk to the Text with CK-12's Highlighting Tool
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Talk to the Text with CK-12's Highlighting Tool
Upgrade, Update, and Customize with CK-12
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Upgrade, Update, and Customize with CK-12

Comments from Educators

kindly email a lesson plan for Angles forms by intersecting secants.

Kimberlee

Finding material for my chemistry students, and also creating my own online text.

Kim W.

I use Ck-12 to find resources for my high school Significant Support Needs class.

Kim C.

CK-12 has revolutionized they way I work with students. I am most especially grateful because it allows me to work with students who are distance learners.

Kim

ck-12 has helped me immensely regarding my preparation for the tasc ged. Thank you so much for this excellent educational website !

Kevin N.

Its fantastically helpful. My students LOVE ITTT!!!!!

Kent R.

You have helped gain me so many assignments with full distinctions

Kelly N.

CK-12 is off thee chart! I love using this tool in my chemistry classroom because it brings in a variety of perspectives and does progressive testing. A great tool for getting them ready for what NGSS is bringing down the pipeline.

Kelly M.

So many STEM resources at all grade levels available from ck-12!

Katy

I love the interactive links in the e-book. I have used the resource for reviews and absent students.

Katy W.

I love cK12! I have used it in my high school science classes for 4 years now. I love how well the readings coordinate with the interactives and I love how I can integrate it into my Edmodo class pages as well. I REALLY love how I can find the same topic at different reading levels and in Spanish so that I can make sure every one of my students can learn science content and themes at any skill level.

Katie

Tutoring!

Katie A.

It's my first year in a new school, with a completely different curriculum structure than I'm used to teaching in biology, and my class did not come with any textbooks! For the first 2 months of school I would spend countless hours trying to combine diffe

Kathryn S.

It has helped my students learn

Kathryn

We frequently use copies of the content to send with students who are suspended, sick or otherwise unable to attend class. It's saved many headaches when trying to find material for these students.

Kathleen N.

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

Kathleen L.

Love the free online science textbooks

Kate O.

Thank you for providing such a comprehensive and high quality library of resources! I love the customizable textbooks. Thank you!

Kate

CK-12 has been incredible. I've been using it to homeschool my middle-schooler for two years now, and it is unbeatable.

Kasheia

CK-12 is a terrific resource. I'm the science chair at an independent school in Los Angeles. We have been moving away from physical texts for a while and CK-12 is the best online alternative in our opinion. Students enjoy the varied learning formats and teachers appreciate the class management options. Happy Birthday CK-12!!!!

Karl F.

Comments from Students

I use the Science Flex book for school!

Veronika

Got me a 100 on project

Takeyriah

you help me learn plant pollination and about biology. thank you and i love you

Severa Swiger

It has helped me understand things that I have never understood before. I really like this website

Serenity Zientek

Well ck12 has helped me become the student that I am I think.

Blake N

It is very fun and helpful

Willy

The way you guys set up the projects helps me learn and actually be interested in my classes.

Matt Fuchs

Helped me get to 7th grade

Yesenia

CK-12 has provide me with numerous resources ranging from interactive videos to simple reading materials for my teachers and students. These items and your company gives public education some highly important resources.

Willie Woodard

I like this. It helps me learn more then I used to know.

Tanaiya Bulloch

CK12 has helped me through many tough times. It's all because of ck12 that I could get back on track in maths class and I could get a perfect score. It has been immensely helpful. Thank you so much.

Taiba Abid

It helps me get my science done

Ivory Ray

Very helpful gave me a lot of information that i need in my study

Wiam Alqaderi

i haven't failed science thx to you

Matthew

It helped me understand the cell theory

Adrina Stone

I can get my school work done in a fun way.

Imoni

CK-12 has been very helpful in my high school years. With the advancement of technology, I no longer have to carry heavy textbooks around school or home or worry about damaging them. CK-12 also provides videos and Other amazing tools, which I am very grateful for!

Bettina

CK-12 has really helped me when it comes to school assignments and homework. It's a great website and I hope it stays up and running for many more days to come :D

Penelope

This program has helped me exceed and get a so much better grade in science. THANK YOU!!!

Careena F

Helped me prepare for my teacher certification math portion.

Tomeka Daugherty