"Human Development" is a browser-based interactive lesson that helps students explore how physical traits change with age, and how we recognize age-related differences in appearance and behavior.

This digital lesson invites students to:

• Complete a visual puzzle to identify family members by age
  
• Sort images of children and adults based on developmental traits
  
• Arrange people by age, from youngest to oldest
  
• Compare parents and children to identify shared features
  
• Match typical traits, proportions, or objects to the correct age group
  

"Human Development" is suitable for use in classroom lessons, small group work, or self-paced exploration. Automatic feedback and 10-point scoring make assessment easy. Its mix of observation, sorting, and reflection also makes it a great fit for enrichment activities.

If you're using a Nature Online lesson for the first time, a short tutorial (under four minutes) is available to guide you through the basics.

Tech Details:

• Runs in Chrome and Firefox (desktop/laptop)
  
• No installation needed — opens in browser
  
• Please allow 15–30 seconds for loading
  

✅ Why you might choose this resource:

• Supports observation, classification, and reasoning about human development
  
• No prep required — ready to use and student-friendly
  
• Compatible with Google Classroom and Chromebooks
  

Feedback welcome:

If you have suggestions or feedback about the resource, I’d love to hear from you. I want you to feel confident using these lessons, and I’m happy to make updates, often by the next day.