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
CK-12 helped me out in areas that some of my teachers do not explain as efficiently.
Ella
It has helped me learn more thank you k12
Takira
CK-12 has helped me understand biology.
Kahrie Stegman
I had a rough time with chemistry but this helped
Rachael
CK-12 helps me understand science a lot better than just randomly taking notes. There's pictures and explanations, too, making it easier to understand the text.
Kaitlyn L
you have taught me how to evaluate problems
Damien
Thank you so much in helping me learn all about science waves, EM waves, etc. I really understood the topic more in depth, and will definitely recommend this website to others! Please make books for economics if not already there. Thank you so much!
Bhavana
It has helped me learn my 2 worst subject and it is now one of my favorite subjects all because of cK-12
Quinn Ames
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 has given me all the resources and information I need to succeed in my class; and excel in my learning!
Hailey Gough
Ck-12 has halped me get better grades in school. It's been a great study tool for me.
Samantha Mcfarlane
it helped me survive physics last year. i would have been lost without it
Alan Grajeda
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 better understand things that were spoken in-class.
Zach
Its a great site!
Ellen
Hello,CK-12! As a non-native English speaker,I have been reading CK-12 textbooks for learning not only STEM but also English. I really appreciate your hard work to provide such a good learning platform for so long. Wish you all happiness,health and prosper
Weilai
you helped me with math and the periodic table
Dagon Evans
Great way to continue the journey of forever learning!
Alberto Brioso
Hello! You guys have helped me through my Pre-Calculus class and I don't know what I would do without you! Thank you
Abigail Franco
CK-12 has helped me a lot. My biology teachers occasionally assigns us CK-12 assignments to do. One time she made us do 23 different lessons! The whole point is that CK-12 is an easy way to learn and to have fun while doing it. Also I think that if I could change anything about CK-12 I wouldn't even do a thing.
Comments from Educators
I love your online book and resources! I have been using your online book with my middle school students for 3 years and I love it. Thank you for providing excellent materials for us.
Connie Jo E.
This website has helped to design a customized website that addresses the specific content my students are covering.
Colleen K.
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.
CK12 provides standards aligned digital text books, videos and activities I use while teaching.
Cindy E.
I am an elementary school teacher and this learning center has advanced my students so much. It is very helpful in the curriculum and overall is a great brain trainer for students k-12
Cindy M.
Excellent exercises and resources! Congratulations!
Cielo
Thanks for making your lessons available! It helps a lot as a supplement of my lesson.
Cicelia A.
It has helped me explain, through problems and text, basic concepts to my students.
Chuck N.
Awesome resource!!! Keep it free!! Keep up the excellent work!!
Christopher S.
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 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
K-12 is still a new educational system here in the Philippines and its effectivity leads me to seek reliable resources and materials. And, indeed, CK-12 has answered my needs as an educator. Cheers, CK-12!
Christine D.
it helped me on a lot of stuff
Christianna
Great science content! Lots of resources; video, text, quizzes. Love the connectivity to Edmodo. Very helpful!
Christiana D.
ck12 has helped me by teaching me new things in algebra and learning more and more about daily math life
Christian D.
So fun for students. Used the Natural Selection mouse interactive as a Do Now, so great.
Cheryl
I first used the CK12.org webpage in conjunction with traditional style biology ibook four years ago after going to a technology training. Now I have open sourced a regular biology Flexboook and an honors Flexbook for use by our entire school and embedded
Chris J.
our lessons make my job so much easier. I can count on quality lessons from you and can use them to meet student accommodations. Thank you.
Chris E.
I can find problems that suitable for my grade 8 son.
Cherry P.
it was a good educational website
Chelsea