Home
Subjects
What's New
CK-12 FlexLets™
Math by Level
Grades 1 - 5
Grade 6
Grade 7
Grade 8
Algebra 1
Geometry
Algebra 2
PreCalculus
Math by Subject
Arithmetic
Measurement
Algebra
Geometry
Probability
Statistics
Trigonometry
Analysis
Calculus
Science
Grades K - 5
Earth Science
Life Science
Physical Science
Biology
Chemistry
Physics
English
Writing
Spelling
Social Studies
Economics
Geography
Government
History
Philosophy
Sociology
More
Astronomy
Engineering
Health
Photography
Technology
College
College Algebra
College PreCalculus
College Human Biology
The Universe
Country
Chile
Brasil
India
Translations
Spanish
Korean
Deutsche
Chinese
Greek
Polski
Learn about our process
Explore
FlexBooks® 2.0
Customizable, textbooks in a new, interactive platform
Adaptive Practice
Building knowledge at each student’s skill level
CCSS
Concepts and FlexBooks® aligned to Common Core
Webinars
Live and archived sessions to learn about CK-12
FlexBooks®
Customizable,
digital textbooks
Simulations
Interactive Physics & Chemistry Simulations
NGSS
Concepts aligned to Next Generation Science Standards
FlexLets
™
Know the essentials.
PLIX
Play. Learn. Interact.
eXplore.
Certified Educator
Stand out as an educator. Become CK-12 Certified.
Study Guides
Quick review with key information for each concept
Cafe
Discussion forum for asking questions and sharing ideas
Schools
FlexBooks® from schools and districts near you
Other Resources
CK-12 Overview
Concept Map
Testimonials
CK-12 Mission
Meet the Team
FlexBooks® 2.0
Customizable, textbooks in a new, interactive platform
FlexBooks®
Customizable,
digital textbooks
Schools
FlexBooks® from schools and districts near you
Study Guides
Quick review with key information for each concept
Adaptive Practice
Building knowledge at each student’s skill level
Simulations
Interactive Physics & Chemistry Simulations
PLIX
Play. Learn. Interact.
eXplore.
Cafe
Discussion forum for asking questions and sharing ideas
CCSS
Concepts and FlexBooks® aligned to Common Core
NGSS
Concepts aligned to Next Generation Science Standards
Certified Educator
Stand out as an educator. Become CK-12 Certified.
Webinars
Live and archived sessions to learn about CK-12
Other Resources
CK-12 Overview
Concept Map
Testimonials
CK-12 Mission
Meet the Team
Looking for a new career? Get in touch
My Dashboard
My Dashboard
My Dashboard
Home
What's New
FlexLets
Explore
FlexBooks® 2.0
Customizable, textbooks in a new, interactive platform
FlexBooks®
Customizable, digital textbooks
FlexLets™
Know the essentials.
Schools
FlexBooks® from schools and districts near you
Adaptive Practice
Building knowledge at each student’s skill level
Simulations
Interactive Physics & Chemistry Simulations
PLIX
Play. Learn. Interact. eXplore.
Cafe
Discussion forum for asking questions and sharing ideas
Study Guides
Quick review with key information for each concept
CCSS
Concepts and FlexBooks® aligned to Common Core
NGSS
Concepts aligned to Next Generation Science Standards
Certified Educator
Stand out as an educator. Become CK-12 Certified.
Webinars
Live and archived sessions to learn about CK-12
Other Resources
CK-12 Resources
Concept Map
Testimonials
CK-12 Mission
Meet the Team
FlexLets
Know the essentials.
Pick a Subject
Math by Level
Grades 1 - 5
Grade 6
Grade 7
Grade 8
Algebra 1
Geometry
Algebra 2
PreCalculus
Math by Subject
Arithmetic
Measurement
Algebra
Geometry
Probability
Statistics
Trigonometry
Analysis
Calculus
Science
Grades K - 5
Earth Science
Life Science
Physical Science
Biology
Chemistry
Physics
English
Writing
Spelling
Social Studies
Economics
Geography
Government
History
Philosophy
Sociology
More
Astronomy
Engineering
Health
Photography
Technology
College
College Algebra
College PreCalculus
College Human Biology
The Universe
Country
Chile
Brasil
India
Translations
Spanish
Korean
Deutsche
Chinese
Greek
Polski
Help
Donate
Contact Us
Have questions?
Visit CK-12 Help Desk
support@ck12.org
650.353.4619
Found a Content Error?
Tell us.
Looking for help getting
started with CK-12 in your
school or district?
jumpstart@ck12.org
CK-12 FOUNDATION
2300 Geng Road
Suite 150
Palo Alto, CA 94303
United States
Find us on Google Maps
CK-12 (India)
3rd Floor, Site No. 646,
27th Main Road
HSR Layout, Sector 1,
Bengaluru, Karnataka 560102
India
Find us on Google Maps