Testimonials

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

CK-12 Simulations Lead to Richer Learning Experiences
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CK-12 Simulations Lead to Richer Learning Experiences
CK-12 Simulations Connect Classroom with Real World Situations
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CK-12 Simulations Connect Classroom with Real World Situations
CK-12's Key Role in the #GoOpen Movement
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CK-12's Key Role in the #GoOpen Movement
With CK-12, Updating Content has Never Been Easier
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With CK-12, Updating Content has Never Been Easier
Why Mrs. P Loves to Use CK-12 in Her Classroom!
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Why Mrs. P Loves to Use CK-12 in Her Classroom!
Create and Collaborate with Fellow Teachers Using CK-12
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Create and Collaborate with Fellow Teachers Using CK-12
Student Engagement: Working Independently Using CK-12
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Student Engagement: Working Independently Using CK-12
Parents Love CK-12
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Parents Love CK-12
CK-12 Has Engaging and Interactive Content
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CK-12 Has Engaging and Interactive Content
CK-12 Content to Match the Right Level
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CK-12 Content to Match the Right Level
CK-12 is User-Friendly and Fits Each School's Style
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CK-12 is User-Friendly and Fits Each School's Style
Pick Up Where You Left Off with CK-12 FlexBooks®
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Pick Up Where You Left Off with CK-12 FlexBooks®

Comments from Educators

Congratulations on your 10th anniversary

Freddie

Great resources

Fred

this website made reading easy to access

Francisco V.

I love ck 12

Focilia

with school

France R.

Excellent resource for students struggling with homework.

Flor

very helpful

Filden

By providing resources for discussion with my graduate students.

Fernando E.

The website is great and rich; wonderful resources. My students demand work from the platform and they love the adaptive practice and quizzes. Thank you.

Felix B.

I have used the lessons to help my ELL's, for introducing lessons, for tutoring, and for enriching my lessons. Thank you!!!

Fernanda S.

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