Active learning ideas
Sustainability is no longer an optional 'add-on' in engineering; it is a core requirement. This topic introduces the Circular Economy, a model that moves away from the traditional 'take-make-waste' approach toward a system where products are designed for longevity, repair, and eventual recycling. Students explore how engineers can design products that can be easily disassembled and whose components can be returned to the production cycle.
Activity 01
Students take apart a small broken electronic device or mechanical toy. They categorize the parts by material and rate how easy it was to separate them for recycling or repair.
What is the circular economy?
Activity 02
Students choose an item they own (e.g., a pair of headphones or a toaster). They discuss with a partner whether it can be repaired if it breaks and what design features make repair easy or difficult.
How can products be designed for disassembly and reuse?
Activity 03
In groups, students are given a simple brief (e.g., design a desk lamp). They must present a design that uses only three materials, all of which must be easily separable without specialized tools.
What role do engineers play in combating climate change?
A few notes on teaching this unit
Watch Out for These Misconceptions
Sustainability is just about using 'green' materials like wood.
Sustainability also involves how long a product lasts and how easily it can be fixed. A long-lasting steel tool may be more sustainable than a flimsy wooden one that breaks and is thrown away quickly.
The circular economy is just another word for recycling.
Recycling is the last resort in a circular economy. The priority is to reduce material use, reuse components, and repair items. Active analysis of product lifespans helps clarify this hierarchy.
Methods used in this brief
Introduction to Materials
Classify basic engineering materials including metals, polymers, and smart materials used in modern manufacturing.
8 methodologies
Sourcing Materials and Environmental Impact
Examine the lifecycle of engineering materials from extraction to processing, focusing on environmental consequences.
8 methodologies