FlexBook

免费CK-12FlexBook®应用程序的智能手机。

With the free CK-12 FlexBook® app for smartphones, you have the power to read the entire collection of CK-12 FlexBook® textbooks on your phone. All CK-12 FlexBook® textbooks are aligned to content standards.

You can also download the textbooks on your phone to read offline, for those times when you don’t have Wi-Fi or cellular connection, making CK-12 content available anytime, anywhere, even without connectivity. You can download as many FlexBook® textbooks as you want, limited only by the storage space on your phone. Want to make room for new FlexBooks®? You can always delete the downloaded FlexBooks® you have finished reading to make room for new ones.

You can also personalize the app by adjusting the font type, font size, line spacing, and background color to suit your reading needs.

CK-12 FlexBook® textbooks are available for the following subjects at the middle school (grades 6-8) and high school (grades 9-12) levels:

Math

Arithmetic

Measurement

Algebra (including Algebra I and Algebra II)

Geometry

Probability

Statistics

Trigonometry

Analysis

Calculus

Science

Earth Science

Life Science

Physical Science

Biology

Chemistry

Physics

Other

SAT Exam Prep

Engineering

Technology

Astronomy

English

History

See all of our learning resources at http://www.ck12.org. Also, see our companion app for Math and Science practice https://play.google.com/store/apps/details?id=org.ck12.app.practice

Don’t forget to check us out on social media!

https://www.facebook.com/CK12Foundation

https://twitter.com/CK12Foundation

https://plus.google.com/+Ck12Org/

https://www.pinterest.com/ck12foundation/

About CK-12

CK-12 is a non-profit that creates and curates high-quality STEM content for students and teachers around the world. The organization was founded with the mission to enable everyone to learn in their own way—for free.