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Grade 3: How The World Works (HTWW)

Economic activities affect people.

Central Idea: We design, invent, and innovate to solve challenges

Push and Pull - what's the difference?

How does a wheel and axle work?

Simple Machines: The Lever

Simple Machines Used in Cars

Simple machines, which include pulleys, wheels and axles, levers, inclined planes, screws, and wedges, combine to create cars, which are compound machines. Click on the image to investigate lots of hands on activities creating machines.

Simple Machines Made by Students

Simple Machines

Newton's Discovery

Simple Machines: The Pulley

Simple Machines: The Inclined Plane

Useful databases:

DK Find Out: Forces & Motion

United Nations International School, Hanoi