Testimonials
See the opinions of students and educators just like you. Select from the following to learn more.
Why Students Love CK-12!
Take a look at what these students have to say about CK-12!
Wonderfull! like that it’s really to the point and precise. There’s lots of pictures and diagrams that are helpful when you are trying to learn.
My teacher made these textbooks, and it has everything that we need for this specific class.
It’s really accessible so it’s easy for the whole class to get on and we just go!
We use it every day because there’s something new that our teacher wants us to look at!
My CK-12 book is really nice because it has all of the information I need in it. Instead of hunting for all of the words and questions I have, it’s all there right in order
Comments from Students
helped me learn problems faster
Vicente Tinoco
i guess its easy to do work on the go now
Halen Willoughby
It has helped me with understanding math better, and let me tell you I suck at math so when I understand it, it is kind of a celebration time for me.
Naomi K
I am a biology student so it helps me a lot when doing assignment
Ikhmal Syuqkin Bin Ismail
It helped me study for some tests that I got 100 on
Garret
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
well it helped me learn stuff that i needed to learn for science
Alex O
I like this. It helps me learn more then I used to know.
Tanaiya Bulloch
Helped me learn stuff
Whopper Jr
It has helped me learn and helped me on my classwork!!!!
Raeleigh-Grace Ruiz
This site has helped me learn about new and different things that I hadn't known before! So, thank you!
Maeve
Ck-12 helped me know about all about the sources of energy.
Alaena R.
Ck12 helped me in learn more about history, it also helped me in my reading and practice with the English. Thank you Ck12.
Ivanna Najera Garcia
It has helped me pass science tests
Hallie
It helped with math and science
Glen
I'm usually great with math but I always struggled with division and ck-12 has helped me concur that issue in his enlightened my math life.
Akinle Armand
Its a great site!
Ellen
Ck-12 is great for catching up on reading!
Comments from Educators
ck12 is outstanding with providing information, testing material and questions for students to improve their learning in biology. thank you
Cyril F.
It is helping us in our Catholic school System in the Diocese of Gbarnga, Liberia- West Africa
Dominic C.
CK-12 is an excellent resource for teachers and students. It has been very helpful in providing intervention & remediation for my students.
Antoinette C.
I am reviewing the topics of Life Science. Interesting. I like the multimedia.
Alexander F.
I use CK12 all the time in my science classes! It is a great summary of all the content, its in one location, and has all the media extras that keep students engaged. They really prefer CK12 to old school textbook assignments. I am teaching a marine scien
Kelli H.
I was asked to teach a high school physics class at a homeschool coop. It's been a great many years since I had physics in college. cK-12 helped me re-learn physics for myself, and it gave me ideas for what to teach. My students and I especially apprec
Linda M.
Improveing the motivation of my pupils
Maisa A.
I love the interactive links in the e-book. I have used the resource for reviews and absent students.
Katy W.
I'm using CK-12 for the first time to teach ESL Science. The materials seem interesting.
Gabriel L.
Allow for my students to receive enrichment with the concepts of mathematics.
Fatima P.
I am so pleased with CK-12. The information is so great for all learning styles and types. The variability of the site allows for differentiation and diversity of learning. Thank you for everything thtat you have done and will do for my students.
Christopher M.
I work at a Stem High School - Hudson Valley P-Tech in NY. Our mission is to connect math to the real world for our students. I liked your distance formula lesson and right now I am looking at your amplitude, Freq & period info. Keep up the good work!!
Lorraine N.
I can barely remember how I used to teach with an old dusty textbook. I have kept those around, but now I use them in a special activity: I have students rip out pages to underscore the fact that science is constantly changing. Traditional text, especially in science, are obsolete before they even ship. Needless to say, they are also very expensive. I have also turned several colleagues onto CK12 and now your awesome products are used in several grades here.
Colin H.
It has saved our district thousands of dollars potentially allowing the district to use the money for other needs. It has allowed the students to use the book on their personal devices, but we also were able to print hard copies at reasonable prices to th
Darlene K.
So fun for students. Used the Natural Selection mouse interactive as a Do Now, so great.
Cheryl
This is a great "go-to" site for my daughter and I when she is struggling with a new math concept and needs that extra help. Thanks cK-12!!
Brenda S.
ck12.org has been a great find! Free, quality on-line textbooks that can be customized as desired. PLUS on-line 'instant' quizzes that provide feedback and links to my LMS - a true TREASURE! Congrats on 10 Years!!!
Donna E.
Assistance with after school program
Farae