PBS
Pbs Learning Media: Lever an Obelisk
Investigate the mechanical advantage of the lever in this interactive activity from the NOVA Web site.
Science Buddies
Science Buddies: Give It a Lift With a Lever
Simple machines allow us to do difficult tasks like lifting objects heavier than our body weight. In this science project you'll build a tabletop lever and measure how much effort it takes to lift an object by altering the length of the...
Scholastic
Scholastic: Dirtmeister's Science Reporters: The Lever
This site provides a description of the lever and its many uses.
Ohio University
Haptic Augmented Simple Machines: The Lever
An explanation of the three types of levers, with examples of each. The formula for the law of equilibrium is also demonstrated.
Science Education Resource Center at Carleton College
Serc: Levers: How the Human Body Uses Them to Its Advantage
Students will apply the concept of levers to the human body and build all three classes of levers within a musculoskeletal context. They will be shown how the musculoskeletal system is a system of levers and one example of each type of...
Ohio State University
Ohio State Univ.: Simple Machines & Mechanical Advantage [Pdf]
This site details how simple machines create a mechanical advantage for humans. Levers, theoretical mechanical advantage, actual mechanical advantage, and pulley systems are discussed.
Math Science Nucleus
Math:science Nucleus:identifying Bones of the Body (Lab)
A nice site which provides descriptions of each of the bones that make up our skeletal system. Then there is a lab activity for students to complete in which they build a skeletal system and describe the structure/function of each bone...
Museum of Science
Museum of Science and Industry: Online Science: Build a Lever
Step-by-step illustrated instructions for an experiment investigating how a lever works. An explanation of the science involved is given at the end.
Scholastic
Scholastic: Study Jams! Science: Force and Motion: Simple Machines
A slideshow and a short quiz on simple machines and how they reduce the amount of work or effort needed to complete a task.
Exploratorium
Exploratorium: Science Snacks: Take It From the Top
Students defy gravity by stacking blocks in different ways in this exercise. Other projects are linked to this lesson as well.
Other
D&t Online: Levers
This site illustrates different classes of levers that are used in simple machines.
CK-12 Foundation
Ck 12: Physical Science: Lever
[Free Registration/Login may be required to access all resource tools.] Definition of a lever and the three different classes, and how each one changes force.
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.
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.
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."
PBS
Pbs Teachers: Secrets of Lost Empires Ii: Lever an Obelisk
Utilize an understanding of how a lever works to lift an obelisk, using as few of the weights and support stones as possible in this online interactive activity.
PBS
Pbs Teachers: Secrets of Lost Empires Ii: Lever Lift
Examine the classes of levers and discover how levers work by raising a brick with shish kebab skewers.
The Franklin Institute
Spotlighting Simple Machines
Simple machines such as inclined planes in wedges and screws are explained.