The fifth graders were studying about the six simple machines. The learned them as WWLIPS; wedge, wheel and axle, levers, inclined plane, pulley, and screw. They are able to identify the 3 kinds of levers. First class levers have the fulcrum in the middle such as a teeter totter, paper punch, and tongs. While a 2nd class lever has the load in the middle like a wheelbarrow and nutcracker. Lastly, a staper and a tweezer are good examples of 3rd class levers because the effort is in the middle.
To end the unit, the students built devices with K-nex. All of the devices used simple machines. It was a challenge for the students to follow the diagrams to build with the K-nex.
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