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Ideas That Changed the World

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November 16, 2025

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Ideas That Changed the World

Published November 16, 2025
A folded pamphlet displays a multi-level model labeled Multi-Use Homeless Cart, showcasing innovative ideas with text and images. The orange background includes a desk adorned with small decorations like a red cross and Canadian flag, symbolizing concepts that changed the world.
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Inspired by the way that World’s Fairs bring visitors into a vision for the future, Fourth Grade students recreated a World’s Fair, complete with their own working inventions and a large-scale model of a city of the future. This exhibition at the San Diego History Center in Balboa Park also helped to celebrate the centennial of Balboa Park. For this project, students researched current problems of today and designed innovations to make our future better. Among the innovations was a city plan that included alternative energy, smart growth, and innovative infrastructure. As part of the project, students presented project proposals to experts such as city planners, transportation planners, and environmental advocates. In addition, students created working prototypes of inventions to help with mobility, environmental issues, hunger, poverty, and water issues, and informational posters and flyers for their inventions.

Teacher Reflection:

This ambitious project shows how we should never underestimate children’s potential. The quality of student work, and their level of professionalism in presenting to experts, families, and the general public was amazing. The depth of learning was evident in the way students transformed knowledge about our world today to create something new.

Student Reflections:

It felt good to present my work to family and strangers to get feedback and to put it out there.

—Asher

The most challenging thing was making everything work as expected. I can do that by taking more time and testing more often.

—Ally

About the Invention Cycle: I learned that it is very challenging, and you fail a lot. The most exciting part for me was seeing it finally work.

—Heather

To learn more visit https://room14explorer.weebly.com

A group of people sit and face a presenter in a modern, glass-walled room with desktops open. A screen displays "Mutual Innovation." Text reads: From inspiration to innovation: co-design PBL with students for Deeper Learning 2026.
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