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
I've only been using this site for roughly a week but in that week I have actually been able to complete and understand my homework and I have a test soon on what I've been studying here and i have no doubt I will get a amazing grade on it. I'm so thankful on the vast number of topics there is as well I shared this site with my friend as well and it definitely helped their grades as well.
Racheal
CK-12 helps me learn more within 15-20 minutes of science than 1 month of science class. Thanks CK-12!
Aditya Parulekar
thanks i just started to use ck12, but i am proud that its bilingual so ou can get pages translate into french for my french students ,,,merci a vous ck12
Geoffroy
It has helped me learn science. In science class we always use this site. My teacher loves this site. Thanks for everything.
Jordan
Ck-12 helped me with math by showing and teaching me about and , Writing and Evaluating Algebraic Expressions.
Alaena.Reinersman
CK-12 has gave me more knowledge about science.
Naomi F
it has helped me understand the complexity of science and break it down for me to comprehend it a whole lot better.
Ivorie Snow
CK-12 has helped my grades improve
Dakota
You helped a lot with my science work. Thank you!
Elizabeth U
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
Its a great website
Blake
It helped me learn a lot, helped during my biology classes
Ivan R Ramos
CK12 has helped me learn things my teacher and school can't provide.
Evelin
its helping my grades get better
Jamario
It has helped me in many ways, i don't have to carry any books anymore thanks to you my shoulders don't hurt anymore HAPPY BIRTHDAY CK-12
Abagayle Spears
CK-12 helped me out by finding information on here for my project
Ajahnee Hudson
CK-12 has helped me better understand how the world is and it's amazing. So, congratulations,happy aniversery and thank you for this amazing website. BYE! ;-P
Carissa
CK-12 helped me with the water cycle and many other things, too.
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