Testimonial

I am a huge proponent of the open-source philosophy, especially where it pertain...
We love the materials on your website. This is a wonderful way for our teachers...
My students are enjoying the books! They are REALLY helpful! In a situation wher...
I appreciate the work that your organization has done. It's wonderful to find a...
Thank you so much for the materials provided online. With our transition to alig...
We are just beginning to explore CK-12. The possibilities are very exciting for...
As a Principal of a small private school, I wanted to express my thanks for the ...
Dear CK12 Support, I want to share with you that last year I used the CK12 Biolo...
I was and I am still amazed by the service, fantastic!
I love the idea behind the CK-12 learning resources. They are very stimulating ...
I hadn't visited your site for a while and I am absolutely astounded and blown a...
CK-12 represents the future of education; knowledge should be available free to ...
I love how I can use my chemistry FlexBook on my iPad and not carry around a hea...
Thank you to everyone at CK12. You have been hugely important in my development ...
I love the idea behind the CK-12 learning resources. They are very stimulating ...
Thank you for providing this free service. As a low-tuition private school, reso...
I really find your books extra ordinarily helpful in my studies. I have recommen...
You guys are the best. You can change many lives, since you pretty much offer fr...
I appreciate the efforts of CK-12 to provide quality products for all educators,...
I LOVE MY CHEMISTRY TEACHER FOR INTRODUCING CK-12 TO ME!!!!
You all are a help to all students. You all are awesome!
First, I used your Biology textbook and (very) successfully completed the CLEP b...
We appreciate the tools provided by CK-12 to help in our children's home school ...
I think the improvements that are being made are wonderful. I believe that this ...
CK-12 is a powerful learning tool because of its customization advantage.
Love Love Love the "Traditional Textbook" feel. In other words, I have had to wo...
I like your organization because it is a great step to spread the education in t...
I am extremely grateful for the CK-12 materials it helps me home school my young...
What you all have done, to open the door to educators to see how you all think, ...
I believe FlexBooks are the way of the future!
High quality, simple, FREE! This enables me to move toward 'tailored learning' f...
This is the first Science text book that my son has enjoyed. He is now getting ...
Thank you for making CK-12 a free source material. I use your resources extensi...
Thank you everybody who is at ck12. For self learners like me this site is the g...
I have a STEM girl (8th grade) who needs advanced content that is not faux/pseud...
CK-12 Foundation is noble work for huminity and mankind
I love the concept, love how the organization is working, and love the website a...
CK-12 is simply amazing!
CK-12 Foundation is noble work for huminity and mankind
Thank you! Without these tools it would be impossible for our family to educate ...
Just discovered your site through a link on the creative commons website. I was ...
CK-12 is an amazing program! I am so glad I found it!
Thank you for your wonderful study help...because of your site and my own school...
I am a rising sophomore at Cupertino High Schoool, and I have been using
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I'm very, very grateful to CK-12. CK12 is really a key resource for our learning...
I enjoy using ck-12 because there are so many different ways to learn the same i...
Like the Geometry textbook very much. We are a poor school district, but our stu...
I'm very, very grateful to CK-12. CK12 is really a key resource for our learning...
I *love* your flexbook system for Alg I and Geometry... This is a fantastic idea...
We really love your products. The ability to access other material is really hel...
Thanks for all the help CK-12, it's a fantastic site.
I love the concept, love how the organization is working, and love the website a...
Wonderful resource. works especially well for more kinetic children who are over...
My students are enjoying the books! They are REALLY helpful! In a situation wher...
I think the site is wonderful and we certainly appreciate the content being upda...
Thank you for your wonderful study help...because of your site and my own school...
I tell everyone about CK-12! I really enjoy being able to bring all of our schoo...
This is an excellent resource that many of my students have found valuable!
Thank you for the materials and work created. It is refreshing to find up to dat...
I really enjoy using ck-12, and I want to thank you for offering such a helpful ...
You guys are the best. You can change many lives, since you pretty much offer fr...
You all are a help to all students. You all are awesome!
I like your organization because it is a great step to spread the education in t...
Thanks for all the help CK-12, it's a fantastic site.
I really appreciate your organization. I am 73 years old and it’s been over 55...
CK-12 has helped me learn and achive good grades.
The FlexBooks are so much better than any other textbooks I have found. They all...
With the student that I am teaching science to, the material you have provided o...
Thank you, CK-12, for all that you do! Without your support, I could not have be...
I think that your site is awesome and I believe it is worth supporting at this t...
You guys are revolutionizing public high school education. It's fantastic! Keep ...
CK-12 has created the most powerful digital text on the market and in the proces...
You are a great resource!!! Thank you for getting the job done.
Love your books and the click through features especially. It helps the content ...
I love how I can use my chemistry FlexBook on my iPad and not carry around a hea...
We appreciate the tools provided by CK-12 to help in our children's home school ...
You guys are awesome and thank you so much for making this. I enjoy using it :)
I LOVE my CK-12 and I love what you have done with the concepts this year. For A...
I appreciate the efforts of CK-12 to provide quality products for all educators,...
I think you are doing a great job and I was glad to incorporate your flexbooks i...
Thank you for the materials and work created. It is refreshing to find up to dat...
Great site with great resources. Well done one creating such an invaluable reso...
I enjoy using ck-12 because there are so many different ways to learn the same i...
Love Love Love what CK-12 has done so far. My students love it, too!
Excellent site with amazing resources. The service you have provided is so great...
First of all, THANK YOU for assembling this extraordinary chemistry text. I am i...
Thank you for the generosity of your efforts. My students have gained from your...
You guys are revolutionizing public high school education. It's fantastic! Keep ...
I really enjoy the site and it's very refreshing to have access to free exam pre...
I think the site is wonderful and we certainly appreciate the content being upda...
I randomly found your site when I was searching for some E-books,and
luck...
Dear CK12 Support, I want to share with you that last year I used the CK12 Biolo...
I love the work you guys are doing. I'm a physics teacher in Denver Colorado and...
Awesome. Thank you. I work with kids with learning disabilities and the text see...