Class: Senior Secondary School 1 (SSS 1)
Term: 1st Term
Week: 1
Age: 15 years
Duration: 45 minutes
Subject: Data Processing
Curriculum Theme: Technology
Previous Lesson: .
Topic: History of Computing: Concrete Devices
Subject Matter: Meaning of concrete devices in computing, examples of concrete devices such as tally stick, coins, rope, identification of concrete devices used for counting and record keeping.

Specific Objectives

By the end of the lesson, pupils should be able to:

Cognitive Domain:

Define concrete devices in computing.
List at least three examples of concrete devices.
Identify the uses of concrete devices for counting and record keeping.

Affective Domain:

Appreciate the early methods of counting and record keeping.
Show interest in the historical development of computing.

Psychomotor Domain:

Handle samples or pictures of concrete devices.
Sketch simple concrete devices like a tally stick.

Collaborate with peers to identify various concrete devices.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum for Data Processing (Senior Secondary Education).
State Unified Scheme of Work for Senior Secondary Schools.
Data Processing for Senior Secondary Schools, Book 1.

Instructional Materials

The teacher will teach this lesson with the aid of:

Tally stick samples.
Pictures of abacus and early counting tools.
Coins.
Ropes.
Charts showing various concrete devices.

Rationale for the Lesson

This lesson helps pupils understand the basic origins of computing by introducing them to early counting tools. It enables them to see how humans developed simple devices to manage numbers and records, laying the foundation for modern computers.

Prerequisite/Previous Knowledge

Pupils have prior knowledge of basic counting and record keeping from their primary education.

Lesson Content/Board Summary

History of Computing: Concrete Devices

Meaning of Concrete Devices in Computing

Concrete devices are early, tangible tools used by humans for counting, calculation, and record-keeping before the invention of electronic computers. These devices often relied on physical objects or marks.

Examples of Concrete Devices

The following are examples of concrete devices:

Tally sticks
Coins
Ropes with knots
Stones
Fingers and toes
Abacus

Uses of Concrete Devices

Concrete devices were primarily used for:

Counting livestock, goods, or people.
Keeping track of transactions or debts.
Performing simple arithmetic operations like addition and subtraction.
Recording historical events or agreements.

Teaching Methods/Instructional Techniques

Discussion, Lecture, Demonstration, Question and Answer, Visual Aids

Instructional Procedures

Step 1: Introduction

Time: 5 minutes
Teaching Skill: Set Induction
Teacher’s Activity: The teacher greets the pupils and asks them how people counted or kept records in ancient times before calculators or computers. The teacher then introduces the topic: “History of Computing: Concrete Devices.”
Pupils’ Activity: Pupils respond to the questions and listen attentively to the introduction.
Learning Point: Pupils are prepared for the lesson and understand its relevance.

Step 2: Explanation of Concrete Devices

Time: 10 minutes
Teaching Skill: Explanation/Definition
Teacher’s Activity: The teacher defines concrete devices as early physical tools for counting and record keeping. The teacher explains that these devices were the first steps in computing.
Pupils’ Activity: Pupils listen, take notes, and ask questions for clarification.
Learning Point: Pupils understand the meaning of concrete devices.

Step 3: Identification of Examples

Time: 10 minutes
Teaching Skill: Demonstration/Identification
Teacher’s Activity: The teacher presents various instructional materials (tally sticks, coins, ropes, pictures of abacus) and guides pupils to identify them as concrete devices. The teacher explains how each device was used.
Pupils’ Activity: Pupils observe the materials, identify the devices, and mention how they might have been used.
Learning Point: Pupils can identify and name different concrete devices.

Step 4: Discussion on Uses

Time: 7 minutes
Teaching Skill: Discussion/Questioning
Teacher’s Activity: The teacher facilitates a discussion on the various uses of these concrete devices for counting and record keeping in ancient societies.
Pupils’ Activity: Pupils contribute to the discussion by stating the uses of the devices.
Learning Point: Pupils understand the practical applications of concrete devices.

Step 5: Group Activity/Reinforcement

Time: 8 minutes
Teaching Skill: Group Work/Collaboration
Teacher’s Activity: The teacher divides pupils into small groups and provides each group with a set of pictures or realia of concrete devices. Each group is asked to discuss and list the name and use of each device.
Pupils’ Activity: Pupils work in groups, identify the devices, and list their uses. A representative from each group presents their findings.
Learning Point: Pupils reinforce their understanding through collaborative learning and presentation.

Step 6: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

What are concrete devices in computing?
Mention three examples of concrete devices.
State two ways concrete devices were used for counting or record keeping.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 7: Conclusion

Time: 3 minutes
Teaching Skill: Summarization
Teacher’s Activity: The teacher summarizes the main points of the lesson, emphasizing that concrete devices were foundational to the development of computing. The teacher assigns homework: “Draw and label any two concrete devices mentioned in class and state one use for each.”
Pupils’ Activity: Pupils listen to the summary and copy down the homework.
Learning Point: Pupils review the lesson and receive further practice.

Lesson Keywords

Concrete devices – Early physical tools used for counting and record-keeping.
Tally stick – A piece of wood or bone marked with notches to record numbers or quantities.
Abacus – An ancient calculating tool with beads that slide on rods.
Counting – The act of determining the total number of items in a set.
Record keeping – The process of maintaining information about activities or transactions.

Differentiation

For pupils who grasp concepts quickly, the teacher can challenge them to research other early counting devices not mentioned in class. For pupils requiring more support, the teacher can provide simplified charts with names and pictures of devices, offering more direct guidance during activities.

Note for teachers using this lesson plan

Teachers should ensure that actual samples or clear pictures of concrete devices are available to make the lesson tangible and engaging. Encourage pupils to share any traditional counting methods they know from their own culture.