Testimonials

See the opinions of students and educators just like you. Select from the following to learn more.

Use CK-12 FlexBooks® to Replace Traditional Textbooks
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Use CK-12 FlexBooks® to Replace Traditional Textbooks
Creating Teams to Make CK-12 FlexBooks®
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Creating Teams to Make CK-12 FlexBooks®
Many Reasons to Use CK-12 FlexBooks®
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Many Reasons to Use CK-12 FlexBooks®
Translate FlexBooks® with just One Click!
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Translate FlexBooks® with just One Click!
The Power of CK-12's Highlighting Tool and Word Definitions
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The Power of CK-12's Highlighting Tool and Word Definitions
Finding the Right People to Pilot CK-12 FlexBooks®
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Finding the Right People to Pilot CK-12 FlexBooks®
Curating CK-12 FlexBooks® for Relevance and Engagement
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Curating CK-12 FlexBooks® for Relevance and Engagement
Incorporating Current Events into a CK-12 FlexBook® the Next Day
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Incorporating Current Events into a CK-12 FlexBook® the Next Day
CK-12 is the High Quality Online Resource Teachers and Students Can Trust
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CK-12 is the High Quality Online Resource Teachers and Students Can Trust
Talk to the Text with CK-12's Highlighting Tool
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Talk to the Text with CK-12's Highlighting Tool
El Paso Bought Laptops and Still Saved Money with CK-12!
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El Paso Bought Laptops and Still Saved Money with CK-12!
Upgrade, Update, and Customize with CK-12
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Upgrade, Update, and Customize with CK-12

Comments from Educators

It has helped my students learn and check understanding in biology and biotechnology and really brings great readings and videos together to teach difficult concepts

Giselle G.

it helped me a lot. several lessons gave me ideas on how to attack and execute my lessons.

Gigi G.

it has helped me to attain my bsc

Garvin M.

I'm a new teacher in an under-funded rural school district. I needed something to help me find quality materials for my classes. CK-12 literally saved me my first year. I will always be grateful for ck-12.

Gage O.

Provides revision.

Gabriella R.

ck12 has help me by making me study even harder i am really excited that i am using ck12 and i would give you all a congradulations your 10th anniversary you did work hard for this

Gabriela C.

I'm using CK-12 for the first time to teach ESL Science. The materials seem interesting.

Gabriel L.

I use Ck-12 all the time in my Google classroom. It is appropriate and gives a variety for all abilities. Thank you

Gina R.

money

Freedom D.

lol idk just joined ttyl

Fredrick W.

Comments from Students

Great resource to learn the most complicated topics in simple ways.

Sean M.

I really understand things. Thank you for making this site.

Sam

this program is awesome. congratulation on your 10th anniversary

Salome W.

cK-12 has helped me to practice questions for biology. Happy 10th Anniversary!!

Sally

It has helped me tremendously! I really appreciate using CK-12 because it helps me with my tutoring lessons.

Salima W.

THANK YOU Ck-12 . You made my dreams come true because due to you i stated leaning in a higher standard . I used to study only through books but you changed style of learning. thanking you again and wishing you on your 10th anniversary , may this organisation will reach to every child ...

Saifullah

we get an online textbook!!

Ruby

IT HELPED WITH ALL OF MY HOMEWORK!!!!!!!!!!!!!! We have our lessons on the readings and they have really helped me learn. There is an occasional grammar issue and a misspelled word but other than that the practices and all the other things are really good for a 6th grade children's science class!! By the way HAPPY ANNIVERSARY!!!!!!!!!!!!!!!

Sadie

I love the life science section and the practice really helps me study for tests and worksheets so now science is a breeze!

Rowan W.

Well ck-12 has helped me by a lot by helping me study with the usefull resources.

Rosie