# History of Computer – Early Counting Devices Primary 3 (Basic 3) – Computer Studies

**COMPUTER STUDIES **

(INFORMATION TECHNOLOGY)

BASIC SCIENCE AND TECHNOLOGY

FIRST TERM

WEEK 2

PRIMARY 3

THEME – BASIC COMPUTER OPERATIONS

PREVIOUS LESSON –

**TOPIC – HISTORY OF COMPUTER – EARLY COUNTING DEVICES **

**LEARNING AREA**

1. Introductory Activities

2. History of Computer – Early Counting Devices

3. Using Early Counting Devices for Basic Arithmetic such as Addition, Subtraction, Multiplication and Division

**PERFORMANCE OBJECTIVES **

By the end of the lesson, most of the pupils should have attained the following objectives – identify early counting devices.

**ENTRY BEHAVIOUR **

The pupils can state different counting materials.

**INSTRUCTIONAL MATERIALS**

The teacher will teach the lesson with the aid of:

1. Sticks

2. Stones

3. Seeds, etc.

**METHOD OF TEACHING **

Choose a suitable and appropriate methods for the lessons.

*Note – Irrespective of choosing methods of teaching, always introduce an activities that will arouse pupil’s interest or lead them to the lessons. *

**REFERENCE MATERIALS**

1. Scheme of Work

2. 9 – Years Basic Education Curriculum

3. Course Book

4. All Relevant Material

5. Online Information

**CONTENT OF THE LESSON **** **

### LESSON 1 – INTRODUCTION

HISTORY OF COMPUTERBefore the invention of computer, people used their fingers and toes in counting.

Sometimes, they used stones, pebbles, cowries even the seed of plants like agbalumo seeds and palm kernel are used in counting.

**MEANING OF EARLY COUNTING DEVICES **

Early Counting Devices are devices used for performing basic arithmetic operations such as addition and subtraction before the invention of computer.

Examples of Early Counting Devices1. Fingers and toes

2. stones

3. wooden sticks

4. pebbles

5. cowries

6. notch sticks

7. Bottle tops (local name – counter)

8. Seeds of plants such as agbalumo seeds (local name – koro or station) and palm kernel.

9. Straw – each straw are cut into smaller pieces for counting.

10. Beads such as rosary which are still commonly used by Catholic and Muslim for Prayer.

Note – The early counting devices are still the basic for teaching and learning arithmetic at early classes.

**LESSON 2 – PRACTICAL DEMONSTRATION USING EARLY COUNTING DEVICES FOR BASIC ARITHMETIC SUCH ADDITION AND SUBTRACTION **

1. 5 + 4, using fingers only.

2. 13 + 8, using fingers and toes.

3. 13 + 8, using fingers only.

4. 15 – 7, any of the stated devices.

5. 5 x 5, any of the stated devices.

6. 20 ÷ 5, any of the stated devices.

4. 25 + 13, using station or counter.

5. Count 100 in 10s and 5s using fingers only.

6. Counting 1000 in 100s and 50s using any early counting devices.

**PRESENTATION**

To deliver the lesson, the teacher adopts the following steps:

1. To introduce the lesson, the teacher revises the previous lesson. Based on this, he/she asks the pupils some questions;

2. Displays different counting materials.

3. Engages the pupils to count with fingers, stones, sticks, etc.

Pupil’s Activities – Count up to 25 using their five fingers, sticks and stones.

4. Teacher’s/Pupil’s Activities – Practical Demonstration of counting using different kinds of early counting devices.

5. Summarizes the lesson on the board.

Pupil’s Activities – Copy as instructed.

**CONCLUSION**

- To conclude the lesson for the week, the teacher revises the entire lesson and links it to the following week’s lesson.

- Next Lesson –

**LESSON EVALUATION **

Ask pupils to –1. identify early counting devices.

2. state 5 counting devices.

3. Uses different counting devices to perform basic arithmetic.

**WORKBOOK **

**WEEKLY ASSESSMENT **

1. _________ is an early counting device.

A. Calculator

B. Computer

C. Palm kernel

2. _________ are used for counting before the invention of computer.

A. Modern Counting Devices

B. Early Counting Devices

C. Abacus Counting Devices

3. _________ are still basic for teaching and learning arithmetic at basic classes.

A. Modern Counting Devices

B. Early Counting Devices

C. Abacus Counting Devices

4. Early Counting Devices can be used for _________ and _________.

A. addition and multiplication

B. Subtraction and division

C. All of the above

5. _________ are used by Catholic and Muslim in prayers.

A. Rosary

B. Finger

C. All of the above

6. The following can be used for arithmetic operations except _________.

A. Counter

B. Calculator

C. None of the above

Mention at least 5 early counting devices.

6. _________

7. _________

8. _________

9. _________

10. _________