Introduction: Begin the lesson by asking the children if they know what gears are and what they are used for. Explain that gears are mechanical devices that transmit power and motion from one part of a machine to another. They are used in many different machines, such as bicycles, cars, and even toys.

Lesson Outline: 1. Explain the different types of gears, such as spur gears, bevel gears, and worm gears. 2. Show the children some examples of gears, such as a bicycle chain and sprocket, and a toy car with gears. 3. Demonstrate how gears work by using a simple gear system, such as a gear train or gear box. 4. Have the children work in pairs or small groups to create their own simple gear system using materials such as cardboard, straws, and toothpicks. 5. Discuss the advantages and disadvantages of using gears in machines.

Questioning: 1. What are gears and what are they used for? 2. What are the different types of gears? 3. How do gears work? 4. What are some examples of machines that use gears? 5. What are the advantages and disadvantages of using gears in machines?

Assessment: Observe the children as they work in pairs or small groups to create their own simple gear system. Ask them to explain how their gear system works and what they learned about gears.

Differentiation: For children who need extra support, provide them with a worksheet that includes pictures of different types of gears and asks them to match the picture to the correct type of gear. For children who need a challenge, ask them to create a more complex gear system using materials such as gears, motors, and batteries.

Plenary: End the lesson by asking the children to share what they learned about gears and how they can be used in machines. Show them a video of a complex machine, such as a car engine, and ask them to identify the different types of gears that are used in the machine.

Resources: 1. Video: How Gears Work - https://www.youtube.com/watch?v=y7Hyc3MRKno 2. Worksheet: Types of Gears - https://www.education.com/worksheet/article/types-of-gears/ 3. Video: How a Car Engine Works - https://www.youtube.com/watch?v=0vGJleVZkv4