Subjects

Math

Elementary Math

Grade 1
Grade 2
Grade 3
Grade 4
Grade 5

Interactive

Math 6
Math 7
Math 8
Algebra I
Geometry
Algebra II

Conventional

Math 6
Math 7
Math 8
Algebra I
Geometry
Algebra II
Probability & Statistics
Trigonometry
Math Analysis
Precalculus
Calculus
What's the difference?

Science

Grade K to 5
Earth Science
Life Science
Physical Science
Biology
Chemistry
Physics

FlexLets

Math FlexLets
Science FlexLets

English

Writing
Spelling

Social Studies

Economics
Community Contributed content is created by users of the CK-12 platform.
Geography
Community Contributed content is created by users of the CK-12 platform.
Government
Community Contributed content is created by users of the CK-12 platform.
U.S. History
Community Contributed content is created by users of the CK-12 platform.
World History
Community Contributed content is created by users of the CK-12 platform.
Philosophy
Community Contributed content is created by users of the CK-12 platform.
Sociology
Community Contributed content is created by users of the CK-12 platform.

More

Astronomy
Engineering
Health
Photography
Technology

College

College Algebra
College Precalculus
Linear Algebra
College Human Biology
The Universe

Adult Education

Basic Education
High School Diploma
High School Equivalency
Career Technical Ed
ESL

Country

Chile
Brasil
India
Georgia

Translations

Spanish
Korean
Deutsch
Chinese
Greek
Polski
Explore

PRODUCTS

Flexi | AI Tutor

A FREE digital tutor for every student

FlexBooks 2.0

New, interactive platform

FlexBooks

Customizable, digital textbooks

Adaptive Practice

Personalized practice questions

Simulations

Interactive Science Simulations

PLIX

Play. Learn. Interact. Xplore.

Study Guides

Quickly review concepts

TEACHER RESOURCES

Webinars

Browse live training sessions

Certified Educator Program

Become CK-12 Certified!

Certified Trainers

Browse CK-12 Certified Trainers

Schools

Find schools & districts near you

INTEGRATIONS

Google Classroom
Canvas
Schoology

Standards

NGSS

Next Generation Science Standards

CCSS

Common Core State Standards

OTHER RESOURCES

CK-12 Resources
Concept Map
Testimonials
CK-12 Mission
Meet the Team
CK-12 Helpdesk
Donate
Sign In
Login / Create Account
SCIENCE

Dana Desonie

Ph.D.

Dana Desonie's set of eight books on environmental issues entitled "Our Fragile Planet" has just been released by Chelsea House. Booklist named "Oceans: How We Use the Seas" as one of the top ten environmental books for youth for 2007! Besides environmental science, Dana also writes and edits in the fields of geology, oceanography, and biology. With a doctorate in oceanography and a trip to the bottom of the ocean in the research submersible Alvin under her belt, she now lives in the Sonoran Desert with her neuroscientist husband and their two children.

Freelance Science Writer with a Ph.D. in Geological Oceanography from Oregon State University
LinkedIn
LinkedIn
Button
Back to Authors List
CK-12 Foundation is a non-profit organization that provides free educational materials and resources.
ABOUT
Our MissionMeet the TeamPartnersPressCareersSecurityStatusSuccess StoriesBlogOverviewCK-12 Usage MapTestimonials
SUPPORT
Certified Educator ProgramCK-12 TrainersWebinarsCK-12 ResourcesHelpContact Us
BY CK-12
Common Core MathK-12 FlexBooksCollege FlexBooksTools and Apps
CONNECT
YouTube
Instagram
TikTok
Medium
Facebook
Twitter
LinkedIn
© CK-12 Foundation 2024 | FlexBook® Platform
Terms of UsePrivacyAttribution GuideContent is licensed under CK-12 Curriculum Materials License