Choosing materials — Design, 11–13 years
Material choice links a product’s job to what a material can withstand and how it behaves. Designers compare properties such as strength, flexibility, weight, texture and water resistance.
What material choice means
Materials are not interchangeable: cardboard bends, glass is hard but can shatter, and rubber stretches and grips. Choosing a material means matching these behaviours to the job the designed object must do.
Why the choice matters
A poorly matched material can make an object break, feel unpleasant or work badly. Designers began treating materials as part of the solution because the same shape behaves differently when it is made from wood, metal, fabric or plastic.
A worked example
Choose a cover for a lunch box. First, reject paper because it soaks up water; second, compare thin metal and plastic; third, choose sturdy plastic because it is light, washable and does not shatter when dropped. The choice follows the material’s properties.
The common mistake
A common mistake is choosing the strongest or most expensive material automatically. That feels safe, but extra strength may add weight, cost or waste when a lighter material already does the job well.
Where it appears
Material selection shapes everyday objects such as raincoats, sports shoes, bridges, bicycles and phone cases. Waterproof fabric keeps rain out, while a flexible shoe sole bends as your foot moves.
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