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