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A collection of science projects, videos and experiments for various grades and topics.

Science Projects or Science Experiments
Grades 3 & 4

Simple Machines part 1 - Levers and Wheels
Simple Machines part 1 lesson for 3rd grade unit. Levers, pulleys, and wheels.
Inclined Planes
Simple Machines part 2 lesson for 3rd grade unit. Inclined Planes

The screw and the wheel and axle
Simple Machines lesson for 3rd grade unit
Pulleys - simple machines
Simple Machines lesson for 3rd grade unit. Pulley

Six Simple Machines
Most mechanical systems employ an element of at least one of these Six Simple Machines: the Lever, the Inclined Plane, the Wedge, the Screw, the Wheel and the Pulley

Activities and games on Simple Machines and Compound Machines - Try out the games, activities to learn more about Simple Machines and Compound Machines

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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