Healthy Literacy for Teens is a middle school resource developed by Stanford University and donated to CK-12 Foundation. This FlexBook is intended to teach teenagers about their bodies and ways to maintain a healthy lifestyle. It complements and supplements CK-12's Life Science Concepts and has been aligned with CK-12 Life Science and Biology Concepts. Check out CK-12 concepts for additional information on these important topics.
The original book can be found at https://www.ck12.org/book/teen-health-literacy/