# Lesson Notes By Weeks and Term - Primary 3

Measurement of length + Generational development of computers- abacus to smart phones

Class: Primary 3

Term: 1st Term

Week: 1

Age: 8 years

Duration: 40 minutes of 3 periods

Date:

Subject: Basic Science and Technology

Topic: Measurement of length

• Generational development of computers- abacus to smart phones

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

1. Explain the meaning of length
2. Describe various instruments for measuring length
3. Identify the metric units of measuring length (mm, cm)
4. Measure and record the length, breadth and height of objects around them
5. Analyze the reason for differences in length
6. Narrate the history of computer
7. Identify and enumerate the early counting devices
8. Describe the transmission of early devices into the present day computers
9. Match the year and the advancement of computer development

INSTRUCTIONAL TECHNIQUES: Identification, explanation, playway method, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: tape measure, meter rule, pupils as learning resources, charts on the standard unit of length, videos on the generational advancement of computer

INSTRUCTIONAL PROCEDURES

PERIOD 1 and 2: Measurement of length

 PRESENTATION TEACHER’S ACTIVITY PUPIL’S ACTIVITY STEP 1INTRODUCTION The pupils are asked to mention and demonstrate the ways in which they measure objects in their localities The class uses the dimensions of the classroom to brainstorm and formulate the meaning of length- length describes how long or short an object is Pupils pay attention STEP 2EXPLANATION The teacher explains that there are two types of measurement for length and gives examples of each1. Olden methods e.g. hand span, stride, arm length etc2. Standard methods- tape measure, wristwatch, wall clock, metre rule etc. Pupils pay attention and participates STEP 3DEMONSTRATION She further explains and demonstrates the metric unit of length10 millimetres = 1 decimetre10 decimetres = 1 centimetre10 centimetres = 1 metre1000 metres = 1 kilometre Pupils pay attention and participate STEP 4NOTE TAKING The teacher writes a short note on the board The pupils copy the note in their books

NOTE

Length describes how long or short an object is

There are two types of measurement for length and gives examples of each

1. Olden methods e.g hand span, stride, arm length etc
2. Standard methods- tape measure, wristwatch, wall clock, metre rule etc

Metric unit of length

10 millimetres = 1 decimetre

10 decimetres = 1 centimetre

10 centimetres = 1 metre

1000 metres = 1 kilometre

EVALUATION:    1. What is length?

1. Describe two olden methods and two standard methods of measuring length
2. Recite the metric unit of length

CLASS ACTIVITY: Pupils are place in small groups, and asked to measure, compare and analyze their varying heights.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the pupils positively

PERIOD 3: Generational advancement of computer

 PRESENTATION TEACHER’S ACTIVITY PUPIL’S ACTIVITY STEP 1INTRODUCTION The teacher revisits the previous lesson and introduces the new topic by explaining what advancement in computer means -Computer advancement is the change in size, purpose and functionality of computers over the years Pupils pay attention STEP 2EXPLANATION The teacher plays the video on the advancement in computer development over the years and ask the pupils to jot down their observations From the video, she explains the early counting devices and gives examples-Early counting devices are devices that were used in ancient times to carry out arithmetic operations like addition, subtraction, multiplication and division of numbers.Examples of early counting devices include; stones, pebbles, sticks, cowries etc. Pupils pay attention and participates STEP 3DEMONSTRATION She further explains and demonstrates the history and sequential graduation of computers from ancient times till date Pupils pay attention and participate STEP 4NOTE TAKING The teacher writes a short note on the board The pupils copy the note in their books

NOTE

Early counting devices are devices that were used in ancient times to carry out arithmetic operations like addition, subtraction, multiplication and division of numbers.

Examples of early counting devices include; stones, pebbles, sticks, cowries etc.

History and sequential graduation of computers from ancient times till date

Before the 20th century, calculations were done by man using crude

devices e.g stones, pebbles etc. at a point in time, some mechanical

devices e.g abacus, slide rule, pascaline etc were also invented to assist in

performing calculations but still wasn’t enough as the volume of

calculations increased. This led to the development of computers to assist

in performing more complex calculations as stated in the generations

highlighted below:

First generation

This was between 1946-1959 and it was vacuum-tube based. It took up an

entire room. Example was the ENIAC- Electronic Numerical

Integrator and Computer

Second generation

This was between 1959-1965 and it was transistor-based. It was smaller in size compared to the first generation computers. Examples include IBM 1620, IBM 7094, CDC 1604, CDC 3600, UNIVAC 1108

Third generation

This was between 1965-1971 and it was integrated-circuit based. It was smaller in size compared to the second generation computers. Examples include IBM-360 series, Honeywell-6000 series, PDP (Personal Data Processor), IBM-370/168, TDC-316

Fourth generation

This was between 1971-1980 and it was VLSI(Very Large Scale Integrated circuits) based. It was smaller in size compared to the third generation computers. Examples include DEC 10, STAR 1000, PDP 11, CRAY-1(Super Computer), CRAY-X-MP(Super Computer)

Fifth generation

This is from 1980-till date and it is ULSI (Ultra large-scale Integration) technology-based. It is smaller in size compared to the fourth generation computers. Examples include Desktop, Laptop, NoteBook, UltraBook, ChromeBook

EVALUATION:    1. What are early counting devices?

1. Give three examples of early counting devices
2. Give two examples of mechanical devices

CLASS ACTIVITY: Pupils in pairs, tag the years against the advancement of computer development

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the pupils positively