Class: Junior Secondary School 3 (JSS3, JSS 3)
Term: 2nd Term
Week: 4
Age: 14 years
Duration: 45 minutes
Subject: Mathematics
Curriculum Theme: Mathematics
Previous Lesson: Views, Plans and Sketches of Solid Shapes
Topic: Probability
Subject Matter: Define probability, use probability to estimate the outcomes of real-life problems involving chance, express probability as a fraction, determine the probability of events such as throwing a die, picking a ball from a bag, etc.

Specific Objectives

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

Cognitive Domain:
(a) Define probability and explain its significance.
(b) Calculate probability in simple real-life scenarios such as rolling a die or picking a ball from a bag.
Affective Domain:
(a) Appreciate the role of probability in everyday decision-making.
(b) Show interest in solving probability problems collaboratively.
Psychomotor Domain:
(a) Demonstrate probability experiments using coins, dice, or balls.
(b) Record outcomes and represent probability as fractions.
Social Domain:
(a) Work cooperatively in groups to conduct probability experiments.
(b) Share observations and discuss results with peers.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum
Lagos State Unified Scheme of Work for Junior Secondary Schools
Cuemath – Probability – Formula, Calculating, Find, Theorems, Examples
Relevant Textbooks

Instructional Materials

The teacher will teach this lesson with the aid of:

Coins, dice, and colored balls in a bag for probability experiments
Whiteboard and markers
Probability charts and visual aids
Graph paper for recording outcomes

Rationale for the Lesson

This lesson helps pupils understand and apply probability to make informed predictions in everyday life.

Prerequisite/Previous Knowledge

Pupils should have prior experience with basic counting, simple fractions, and understanding of chance or likelihood from everyday examples.

Lesson Content/Board Summary

Probability

Definition of Probability

Probability is the measure of the likelihood of an event happening. It helps us predict how often an event may occur.
The following are key points:

Probability is always a number between 0 and 1.
Probability of 0 means the event will not happen.
Probability of 1 means the event is certain to happen.
Probability can be expressed as a fraction, decimal, or percentage.

Probability of Simple Events

Simple events are events with a single outcome.
These include:

Tossing a coin (Head or Tail)
Rolling a die (numbers 1–6)
Picking a ball from a bag with different colors

Calculating Probability

The probability of an event is calculated using the formula:
P(E) = Number of favorable outcomes / Total number of possible outcomes
Examples include:

Probability of getting a Head when tossing a coin = 1/2
Probability of rolling a 4 on a die = 1/6
Probability of picking a red ball from a bag containing 3 red and 2 blue balls = 3/5

Real-Life Applications of Probability

Probability is used to make predictions and decisions in daily life.
They are:

Weather forecasting (chance of rain)
Games of chance (lottery, dice games)
Estimating outcomes in experiments or surveys

Teaching Methods/Instructional Techniques

Discussion, Lecture, Demonstration, Visual Aids, Group Work, Guided Practice

Instructional Procedures

To deliver this lesson, the teacher will adopt the following steps:

Step 1: Introduction

Time: 5 minutes
Teaching Skill: Set Induction
Teacher’s Activity: Review the previous lesson and introduce probability using everyday examples (coin toss, rolling dice).
Pupils’ Activity: Listen and respond to questions about previous knowledge.
Learning Point: Pupils relate probability to familiar situations.

Step 2: Definition of Probability

Time: 7 minutes
Teaching Skill: Explanation
Teacher’s Activity: Define probability, explain key points, and write on the board.
Pupils’ Activity: Copy definition and examples into notebooks.
Learning Point: Pupils understand the concept and range of probability values.

Step 3: Simple Events

Time: 7 minutes
Teaching Skill: Demonstration
Teacher’s Activity: Demonstrate simple events using coins, dice, and balls.
Pupils’ Activity: Observe and identify possible outcomes.
Learning Point: Pupils recognize simple events in probability.

Step 4: Calculating Probability

Time: 10 minutes
Teaching Skill: Guided Practice
Teacher’s Activity: Solve probability problems using the formula, write steps on board.
Pupils’ Activity: Work out calculations in pairs.
Learning Point: Pupils can calculate probability for simple events.

Step 5: Real-Life Applications

Time: 5 minutes
Teaching Skill: Discussion
Teacher’s Activity: Explain how probability is used in daily life; provide examples.
Pupils’ Activity: Suggest other situations where probability is useful.
Learning Point: Pupils appreciate the importance of probability.

Step 6: Note-Taking

Time: 5 minutes
Teaching Skill: Writing Skills
Teacher’s Activity: Instruct pupils to summarize key points in their notebooks.
Pupils’ Activity: Write clear notes from board summary.
Learning Point: Pupils organize learning points effectively.

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 probability.
State the probability of rolling a 3 on a die.
How do you express probability as a fraction?
Give an example of probability in real life.
Pupils’ Activity: Respond orally and in writing to questions.
Learning Point: Pupils demonstrate understanding of lesson objectives.

Step 8: Conclusion

Time: 1 minute
Teaching Skill: Summarization
Teacher’s Activity: Recap key points and assign practice problems.
Pupils’ Activity: Listen and note homework.
Learning Point: Reinforce lesson understanding.

Lesson Keywords

Probability – chance of an event happening
Event – outcome being considered
Outcome – possible result of an action
Favorable outcome – result we want
Fraction – way to express probability

Differentiation

Use group work, visual aids, and simple real-life examples to cater to varying learning abilities.

Note for teachers using this lesson plan

Ensure pupils conduct hands-on experiments with coins, dice, or balls to solidify understanding. Encourage peer discussion for problem-solving.