Class: Senior Secondary School 1 (SS1, SS 1, SSS1, SSS 1)
Term: 2nd Term
Week: 6
Age: 15 years
Duration: 45 minutes
Subject: Economics
Curriculum Theme: Economics
Previous Lesson: Population: Meaning, Determinants and Theories.
Topic: Population
Subject Matter: Geographical distribution of population; age distribution; sex distribution; occupational distribution.

Specific Objectives

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

Cognitive Domain:

Define geographical distribution of population.
Explain age distribution of population.
Explain sex distribution of population.
Explain occupational distribution of population.
State factors that influence where people live within a country.
Interpret simple charts showing population by age, sex, and occupation.

Affective Domain:

Show interest in population distribution data as a basis for planning.
Appreciate the need for fairness in providing services to areas with different population sizes.

Psychomotor Domain:

Read and interpret population distribution charts and tables correctly.
Construct a simple bar chart from given population-by-age or population-by-occupation data.

Work cooperatively in groups to interpret distribution data and report findings.
Participate respectfully in discussions about differences in population distribution across regions.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum
State Unified Scheme of Work
Recommended Economics textbook for Senior Secondary Schools (e.g., Comprehensive Economics for SSS, Book 1)
World Bank Data: Population, total
United Nations DESA: Population Division
Encyclopaedia Britannica: Population

Instructional Materials

The teacher will teach this lesson with the aid of:

Charts showing population by country/region
Charts showing population by sex, age, and occupation
Population pyramid samples
Map of Nigeria and a world map
Board and markers/chalk

Rationale for the Lesson

This lesson helps pupils understand how people are spread across areas and how age, sex, and occupation structures affect jobs and public services. It also helps pupils interpret population data that is used for planning schools, hospitals, housing, and employment.

Prerequisite/Previous Knowledge

Pupils can read simple tables and graphs and have basic knowledge of Nigeria’s regions and selected countries.

Lesson Content/Board Summary

Population Distribution

Geographical distribution of population

Geographical distribution of population refers to how people are spread over different areas or regions of a country or the world.

The following are factors that influence geographical distribution of population:

Climate (rainfall and temperature)
Relief/topography (mountains, plains, swampy areas)
Soil fertility and vegetation
Availability of water (rivers and lakes)
Mineral resources and economic opportunities
Transport and communication networks
Security and political stability
Availability of social amenities (schools, hospitals, electricity)

Age distribution of population

Age distribution refers to how a population is shared among different age groups such as children, working-age adults, and the elderly.

The following are common age groups used in population studies:

0–14 years (children)
15–64 years (working-age group)
65 years and above (elderly)

The following are implications of age distribution:

High number of children increases demand for schools and child healthcare.
Large working-age group can increase labour supply and production.
High number of elderly increases demand for health services and support.
High dependency ratio can reduce savings and slow development.

Sex distribution of population

Sex distribution refers to the number of males and females in a population and how they are spread within different age groups.

The following are key points about sex distribution:

Sex ratio compares the number of males to females in a population.
Sex distribution affects labour force size and social planning.
Migration and cultural practices can influence the balance of males and females in an area.

Occupational distribution of population

Occupational distribution refers to how the labour force is shared among different jobs and economic activities.

The following are major occupational groups:

Primary occupations (farming, fishing, mining)
Secondary occupations (manufacturing, construction)
Tertiary occupations (trade, banking, teaching, transport, health services)

The following are implications of occupational distribution:

High primary occupation share may show low industrial development.
Rising secondary and tertiary shares may show growth in industry and services.
Occupational structure affects income levels, taxation, and demand for goods and services.

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 displays charts showing population figures for different regions/countries and asks pupils to observe areas with high and low population concentration.
Pupils’ Activity: Pupils identify areas with higher and lower population from the charts and give simple reasons based on what they know.
Learning Point: Population is not evenly distributed across areas.

Step 2: Geographical distribution of population

Time: 7 minutes
Teaching Skill: Explanation with Visual Aids
Teacher’s Activity: The teacher explains geographical distribution and guides pupils to list factors that influence where people live, using map examples.
Pupils’ Activity: Pupils copy the definition and list factors, then mention one local example of a densely populated area and one sparsely populated area with reasons.
Learning Point: Physical and economic factors influence population concentration.

Step 3: Age distribution of population

Time: 7 minutes
Teaching Skill: Demonstration
Teacher’s Activity: The teacher uses a simple population pyramid or age-group chart to explain age distribution and its implications for schools, jobs, and healthcare.
Pupils’ Activity: Pupils interpret the chart and state implications of having more children or more working-age people in a country.
Learning Point: Age structure affects dependency and development needs.

Step 4: Sex distribution of population

Time: 8 minutes
Teaching Skill: Questioning and Discussion
Teacher’s Activity: The teacher explains sex distribution and sex ratio and guides pupils to interpret a simple chart showing males and females in a population.
Pupils’ Activity: Pupils interpret the chart and mention factors that can affect sex distribution such as migration and jobs.
Learning Point: Sex distribution affects planning and labour supply.

Step 5: Occupational distribution of population

Time: 6 minutes
Teaching Skill: Explanation
Teacher’s Activity: The teacher explains occupational distribution and classifies occupations into primary, secondary, and tertiary, with examples common in Nigeria.
Pupils’ Activity: Pupils classify given jobs into the three groups and state what occupational structure may suggest about development level.
Learning Point: Occupational structure shows how a country’s labour force is organised.

Step 6: Group interpretation of distribution data

Time: 7 minutes
Teaching Skill: Group Work and Presentation
Teacher’s Activity: The teacher shares charts showing population by region, age, sex, and occupation, and guides groups to interpret and compare patterns across countries/regions.
Pupils’ Activity: Pupils interpret the charts in groups and present two key differences and likely reasons for the differences.
Learning Point: Population distribution data can be interpreted to explain real differences between places.

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

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

Define geographical distribution of population.
List five factors that influence geographical distribution of population.
State two implications of age distribution for development.
Explain occupational distribution and list the three major occupational groups with examples.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 0 minutes
Teaching Skill: Summary
Teacher’s Activity: The teacher summarises key points and gives an assignment: use a simple chart to compare age and occupational distribution of Nigeria and one other country and write three observations.
Pupils’ Activity: Pupils copy the summary and assignment.
Learning Point: Population distribution concepts can be applied using real data.

Lesson Keywords

Geographical distribution – how people are spread across different areas or regions.
Population concentration – clustering of people in a particular area.
Age distribution – how a population is shared among age groups.
Dependency ratio – ratio of dependants to working-age population.
Sex distribution – number of males and females in a population.
Sex ratio – comparison of males to females in a population.
Occupational distribution – how the labour force is shared among different jobs.
Primary/Secondary/Tertiary occupations – farming/mining; manufacturing; services.

Differentiation

Support learners with simplified charts and guided prompts for interpretation, while advanced learners compare two countries and explain likely reasons for differences in age and occupational distribution.

Note for teachers using this lesson plan

Use clear charts with small data sets and insist on correct interpretation of labels, units, and categories. Keep examples relevant to pupils’ locality and ensure group tasks end with short, examinable points on the board.