Testimonials

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

CK-12 Helps to Address Learning Gaps
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CK-12 Helps to Address Learning Gaps
CK-12 Offers Resources Students Understand
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CK-12 Offers Resources Students Understand
Embedding Videos in CK-12 to Enhance Student Understanding
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Embedding Videos in CK-12 to Enhance Student Understanding
Easy to Update and Modernize Content with CK-12
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Easy to Update and Modernize Content with CK-12
CK-12 Makes Differentiated Learning Come to Life
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CK-12 Makes Differentiated Learning Come to Life
CK-12 Keeps Your Students Engaged
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CK-12 Keeps Your Students Engaged
CK-12 Offers Material Unavailable By Traditional Publishers
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CK-12 Offers Material Unavailable By Traditional Publishers
CK-12 Meets Every Student's Needs
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CK-12 Meets Every Student's Needs
Confidence in Connecting to Standards with CK-12
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Confidence in Connecting to Standards with CK-12
It's Worth Transitioning from Traditional Textbooks to CK-12 FlexBooks®
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It's Worth Transitioning from Traditional Textbooks to CK-12 FlexBooks®
CK-12 Has Revolutionized How I Teach
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CK-12 Has Revolutionized How I Teach
Using CK-12 Every Day in Class
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Using CK-12 Every Day in Class

Comments from Educators

CK-12 has provided our school with free science texts and has given my students the opportunity to publish their writing online in the Understanding Biodiversity book. Thank you!

Amy H.

helped me learn how to do my math better

Brady

Absolutely an amazing experience. I love that I can customize the textbooks to include what I believe is relevant in the order that I feel is a good flow. Thank you for saving my district so much money!

Jason W.

with lessons for the 1st grade classroom

Loralei B.

ck12 has help me by making me study even harder i am really excited that i am using ck12 and i would give you all a congradulations your 10th anniversary you did work hard for this

Gabriela C.

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.

NOT AT ALL

Gracie

many teaching resources are getting this site for me

Jaleesa

I have been able to take the real world applications and interesting topics from ck-12 and incorporate them into my science lessons.

Lauren H.

It's a very fun and interactive way to teach and sum up the boring information teachers repeat again and again.

Joe M.

I have used parts and all of many lesson plans. Thanks.

Cathryn B.

I am a high school biology and chemistry teacher. I assign ck-12 as a resource for students who struggle with concepts. I love the Real Life articles. The students get to understand why science is important. Thank you

Laura S.

I have greatly appreciated the flex books and the connected practice sets! Those practice sets have been great help to my students that need just a little more time with material, and it saves me time from having to create more material resources myself!

Christine

I have used the lessons to help my ELL's, for introducing lessons, for tutoring, and for enriching my lessons. Thank you!!!

Fernanda S.

CK-12 has helped my students access current science content as we implement the Next Generation Science Standards.

Barbara W.

Provides plenty of well structured lessons

Janet

You have helped my teachers by provided a large and reliable source of information for them, as well as a cite that their students can go on and explore. In turn, that helps me.

Alyssa

I am a special education teacher, I use information to help kids understand concepts in the biology class.

Jason V.

Comments from Students

you helped me with science grade

Faith

you helped me pass algebra 4

Jonny

This site helped me that I am passing all my grades and I appreciate all the help.

Matthew Abadam

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

Candace

Thanks!!!!!!!!!!!

Yoselin Huequis-Ayala

I am a student, currently getting my Masters in Special Education and I have found that the resources available at ck-12 have inspired me and stimulated a fresh approach to teaching and learning, particularly for kids with special needs and for kids needing enrichment resources.

Patty Adams

it helped me understand physics more.

Jamessantana

well it help me to do my cornel notes and to get the work i need

Abdiel

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

Alan Mao

My school curriculum is onilne, and they direct me to you guys for science, and it's actully fun to learn science now!

Maeryn

You helped me by learning how atoms are and how small they are. It's crazy on how small they really are.

Falynn Peterson

CK-12 Helped me better understand things that were spoken in-class.

Zach

CK-12 Provides excellent learning tools and essentials and allows me to access it online for free.

Sean Finn

Hello!!!

Venku

OMG!! cK-12 has helped me with sooo many assignments at school!! When my teacher assigns me a page from this website, it helps me with things I don't know, and when I take a quiz afterwards, I get a great grade!! Thank you cK-12!! :D

Wolfesess

I love to use this website for 7th grade science it helps soooooo much i love this website.

Ian

y'all helped me learn about minerals.

Izzy

CK-12 has helped me understand chemistry better and i want to congratulate and thank you for your services

Abdullah Jamal