PBS
Nova: How Is Sex Determined?
This site focuses on the first 16 weeks of embryo development when the sex of the child is determined.
TED Talks
Ted: Ted Ed: How Do Your Hormones Work?
Emma Bryce explains how hormones regulate everything from your sleep to the rhythm of your beating heart, exerting its influence over each and every one of your cells.
The Association of the British Pharmaceutical Industry
Abpi: Hormones and Their Effects
A complete, student-led lesson on the endocrine system. Students work their way through illustrated and animated tutorials, and answer review questions along the way. There is a self-checking quiz at the end of the lesson.
OpenStax
Open Stax: Anatomy and Physiology: Male and Female Reproductive Development
Find out about the development and hormonal changes associated with reproductive development for both males and females.
Healthline Media
Medical News Today: What Is Puberty?
Discover what puberty is and the difference between early puberty and late puberty in this informative article from Medical News Today. Learn what happens during girl's and boy's puberty, what causes it, and treatment options.
National Cancer Institute at the National Institutes of Health
Seer Training Modules: Introduction to the Reproductive System
Self-guided learning activity where students learn about the structure and function of the male and female reproductive systems. There is a short quiz at the end of the lesson to check for understanding.
University of Arizona
The Biology Project: Human Biology
This site provides basic information on human genetics and reproduction using tutorials, simulations, images and quizzes. There are also links to other worthwhile sites.