SIMPLE MACHINES

SUBJECT: BASIC SCIENCE AND TECHNOLOGY

TERM: THIRD TERM

WEEK: WEEK 2

THEME: YOU AND TECHNOLOGY

CLASS: PRIMARY 6

TIME: 40 MINUTES

TOPIC: SIMPLE MACHINES

UNITS:

• Definition of simple machine
• Meaning of lever
• Example of lever
• Parts of lever
• Uses of lever

PERFORMANCE OBJECTIVES

At the end of this lesson, Pupils should be able to:

1. Define simple machine
2. Identify simple machine
3. Meaning of lever
4. Identify the parts of lever
5. State the classes  of lever
6. List the use of lever
7. Uses of lever

TEACHING AND LEARNING MATERIALS

• Screw driver
• knife
• bottle opener
• scissor
• plier
• seesaw
• crowbar
• Whiteboard/Chalkboard
• Explanatory posters/pictures
• Explanatory videos

TEACHING AND LEARNING METHODS

• Explanation
• Discussion
• Questions and answer

REFERENCE MATERIALS

• NERDC Basic Education Curriculum for primary schools.
• Universal Basic Education Curriculum for primary schools.
• Lagos State Scheme of Work.
• Online Materials.
• Basic Science and Technology for Primary Schools.

CONTENT

DEFINITION OF SIMPLE MACHINE

Simple machine is any device that make work easier, faster and convenient.

Types of simple machines

• The lever like pliers, seesaws.
• The inclined plane like a sloping board use to bring down heavy load from a trailer.
• The wedge like knife blade, chisels
• The pulley like  pulley used in drawing water from well
• The screw  like Bolt and nut
• The wheel and axle like wheel that load drum of a crane.

            LEVER

Lever is a simple machine used for lifting loads.

Examples and classes of levers

1. First class lever :
2. Second class lever
3. Third class lever

First Class lever: the fulcrum is between the load and the effort. Examples are scissors, seesaws, pliers, spade.

Second Class Lever: The load is between the effort and the fulcrum. Examples are nut cracker, wheel barrow.

Third class lever: the effort is between the fulcrum and the load. Examples are shovel, tweezers.

PART OF A LEVER

There are three part of a lever they are:

1. Effort: is the force applied to overcome a load.
2. Load: is the Object being lifted.
3. Fulcrum is the point of turning.

            USES OF A LEVER

1. Table knife is used at home for cutting vegetables, fruits.
2. Bottle opener in opening of bottle (drink).
3. Stapler is use for holding papers, book.
4. Shovel is use for digging.

PRESENTATION

• The Teacher revises the previous lesson.
• The Teacher introduces the topic.
• The Teacher explains the lessons.

LESSON EVALUATION

• Name three simple machine you know
• List the three classes of lever.
• Name three. Common levers in your home.
• Locate load, fulcrum, and effort on a scissor.
• List three uses of lever.

CONCLUSION: the teacher summarize the lesson.