Science Education Resource Center at Carleton College
Serc: First Class Levers
Through observation and inquiry, students are given various objects to investigate how levers work and why they might be useful.
Khan Academy
Khan Academy: The Forearm as an Example of a Third Class Lever
This is a five-question quiz related to the passage "The Forearm as an Example of a Third-class Lever."
Science Education Resource Center at Carleton College
Serc: Levers:relationship of Force of Effort & Resistance Fulcrum Placement
Students investigate the relationship between the two forces and the location of the fulcrum in a first class lever. Students work in cooperative groups of approximately three to make observations that they can then generate a formula...
Science Struck
Science Struck: Simple Machine: Levers
Explains what a lever is, its history, how it works, the formula for calculating its mechanical advantage, classes of levers, and uses of levers.
Sophia Learning
Sophia: Simple Machines: Levers: Lesson 3
This lesson will introduce the three types of levers and show how to calculate the mechanical advantage of each. It is 3 of 3 in the series titled "Simple Machines: Levers."
Other
Manhattan Beach Unified School District: Levers and Other Simple Machines
Learn about levers and make the connection between these simple machines and the human body.
Integrated Publishing
Integrated Publishing: Levers
A quite lengthy chapter on the simple machine the lever. Includes uses, classes, mechanical advantage, formulae, etc. A full discussion, with good illustrations.
The Franklin Institute
Spotlighting Simple Machines
Simple machines such as inclined planes in wedges and screws are explained.