|Name of Activity||Gears|
|Keywords||gears, axles, Drive Gear, Follower Gear, Gear Ratio, Gear Trains, Simple Machines|
|Grade Level||K, 1, 2, 3, 4, 5, 6|
|Time||1 Hour Total|
|Brief Description||Students will learn about gears through hands on exploration with LEGOs and a worksheet.|
|Lesson Objectives:||– Familiarize students with gears.
– Learn how gears can be useful.
|Materials Needed:||One Homemade LEGO kits for each group:
– Kit should contain several gears of each size (about 5 of each).
– Kit should contain many axles (10 – 20) and bushings (20 – 30).
– Kit should contain a “challenge wall” – This wall should be a collection of beams with holes about 4 inches tall and 6 – 8 inches wide. On the top left corner attach a gear with an axle and a bushing.
– One activity worksheet per student.
|Preparation and Set Up:||– Create homemade LEGO kit.
– Make photocopies of worksheets.
– Arrange students in pairs.
– Distribute materials.
|Necessary Background||The engineering design process is an eight step process that engineers use to design:
Step 1. Identify the need/problem
Step 2. Research the need/problem
Step 3. Develop possible solutions
Step 4. Select the best possible solution
Step 5. Construct a prototype
Step 6. Test and evaluate the solution(s)
Step 7. Communicate the solution(s)
Step 8. Redesign
|Extensions or Modifications:||– Have students make the top left gear turn clockwise when the bottom right gear is turned counterclockwise.
– Add a spindle attached to a net over a LEGO man on the top left gear that the students have to turn with the other gears. Have the challenge be to free the LEGO man by adding a Gear Train to the lower right of the wall so that when it is turned the net is lifted.