Name of Activity  Levers 

Author  Laurie Cormler 
Keywords  levers, found materials, Simple Machines 
Subject  Simple Machines 
Grade Level  4, 5, 6 
Time  1 Hour Total 
Brief Description  Students will explore the different classes of levers using simple classroom materials. 
Lesson Objectives:  – Familiarize students with levers, a type of simple machine. – Teach students about the usefulness of levers and how they are applied in the real world. – To introduce vocabulary associated with levers. 
Materials Needed:  – Lever worksheet. – LEGO Simple Machines kit. 
Preparation and Set Up:  – Make enough copies of the worksheet for each student. – LEGO Simple Machines kit. – Arrange students in groups. – Distribute materials. 
Necessary Background  There are three classes of levers:
Class 1 levers: The WORK on either side of the fulcrum is equal to the distance from the fulcrum times the force applied (weight of the object). For levers to balance the work on one side must equal the work on the other side – Force1 * Distance1 = Force2 * Distance2. Vocabulary: 
Procedure 

Extensions or Modifications:  – Students can use their lever to accomplish a specific task, e.g., lift a LEGO person to the top of a wall. – Explore different locations for a fulcrum. – Turn the lever into a catapult. 
Reference 1  http://sites.tufts.edu/stompactivitydatabase/files/formidable/lev1.doc 
Reference 2  http://sites.tufts.edu/stompactivitydatabase/files/formidable/lev2.pdf 
Did this activity with our 5th graders (Murphy, Argenziano). Followed this unit exactly except for the worksheet!