Testimonials

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

How to Use CK-12 to Support Struggling Readers
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How to Use CK-12 to Support Struggling Readers
CK-12 Has Engaging and Interactive Content
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CK-12 Has Engaging and Interactive Content
Worry-Free Content Curation with CK-12
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Worry-Free Content Curation with CK-12
Starting with a CK-12 FlexBook® and Curating as You Go
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Starting with a CK-12 FlexBook® and Curating as You Go
EPISD Saw Results After One Year of CK-12 FlexBooks®
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EPISD Saw Results After One Year of CK-12 FlexBooks®
Pick Up Where You Left Off with CK-12 FlexBooks®
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Pick Up Where You Left Off with CK-12 FlexBooks®
"Dude, Just Use Your Phone" on CK-12!
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"Dude, Just Use Your Phone" on CK-12!
CK-12 is Adjustable to Each Student's Level of Learning
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CK-12 is Adjustable to Each Student's Level of Learning

Comments from Educators

WOW! I just absolutely can not express so helpful CK-12 has been in my science teaching. We are moving away from our old standards and adopting NGSS. We currently do not have a textbook to use with the students and CK-12 has been a life saver! Thank you!

Lisa N.

ck-12 is helping me design my own text book for students. It is great that I can incorporate desmos activities and hands on learning.

Kande W.

i can make my students understand better, thanks

Amruth L.

CK-12 helps me find resources necessary for teaching standards and skills that are not in my current text book. It is supplemental material and websites that help me teach!

M Hance

Providing guided resources for teaching Earth Science. I class that I only recently began teaching was incredibly beneficial

Cassy B.

You have helped me create quick and modifiable text for my students!

Alexa C.

cK-12 has helped me with supplemental learning for my students in Science 8th grade and HS Chemistry class. It's great since the cK-12 lessons teach the same scientific vocabulary that are in my standards. Thank you for making education free, accessible and easy to accomplish on a smart phone. You are speaking the students' language!

Adam

cK12 has helped me immensely with book resources for my students. Now they get to read smaller sections and not be so encumbered with such large science textbooks. The practice is becoming a very valuable tool with my students as well.

Kristin

I'm a new teacher in an under-funded rural school district. I needed something to help me find quality materials for my classes. CK-12 literally saved me my first year. I will always be grateful for ck-12.

Gage O.

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

Jimmel

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

Congratulations on your 10th anniversary

Freddie

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

Kimberlee

teaching

bryant

I have two children. One is 10 and the other 7 and they both are getting better with math as the semesters go by. Thank you for makimg this site free.

Chantely B.

I began homeschooling and immediately went into panic mode, but after another homeschooling mother recommended this site I was immediately put at ease.

Elizabeth S.

I just found this website yesterday, and I think that it's awesome! I can't wait to use this all the time in my classroom! Thanks!!

Julie B.

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.

Comments from Students

Hello there! Congratulations and thank you for helping me through the great explanations thank you.

Willow

i haven't failed science thx to you

Matthew

Helped me learn science!!!

Yzan

To better understand nature.

Abraham Bernal

I'm doing an assignment for science and this link was recommended

James W

It helps me understand and learn things better.

Jacara Miller

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

Samarj Clifton

it made my life easy

Mathunyane Alfred

cK-12 helped me get through my high school midterm without any problem, It was easy to study and quiz myself using this site

Garrett Keslar

ck12.org has helped me a ot keep it up guys and thank you so much

Canyon

necesito la resolver un problema con el teorema fundamental del calculo

Natalia T

CK-12 has helped me maintain and keep a good grade in ACC Chemistry this year. Keep up the good work!

Dalton Polley

IT HAS HELPED ME A LOT IN EXAMS.

Tony Jeeson

Your articles and tests help me do well in my science tests. thanks

Olivia Y

It has helped me learn more thank you k12

Takira

CK-12 has helped me understand my homework a lot more.

Fafnir

CK-12 has reinvigorated my love for knowledge and is my go to resource to practice and brush up on skills. Thanks to CK-12 I was able to relearn most of what I forgot and get back in school, thank you CK-12 I don't know what it would be like if you weren'

Ibrahin Ayubi

it has helped me get a better edjucation the teachers are tough sometimes but i think it is better for me

Serena Woodward