Lesson 1: Basic Percentage Calculations
| Section | Details |
|---|---|
| Objective | Calculate a given percentage of a quantity; express one quantity as a percentage of another. |
| Activities | – Starter (5 mins): Ask: “What is 25% of 60?” – Main (30 mins): Teach percentage of a quantity and percentage comparisons. Practice with money and marks examples. – Plenary (5 mins): Quick quiz with real-life examples (discounts, scores). |
| Resources | Worksheets, calculator, PowerPoint examples. |
| Time | 40 minutes: 5 (Starter) + 30 (Main) + 5 (Plenary). |
| Homework | Write 10 problems finding percentages of given values. |
| Assessment | Worksheet: basic percentage calculations. |
| Past Paper Practice | “Find 15% of 320.” |
Lesson 2: Percentage Increase and Decrease
| Section | Details |
|---|---|
| Objective | Calculate percentage increase and decrease in different contexts. |
| Activities | – Starter (5 mins): Quick example: A price rises from $50 to $60. What is the percentage increase? – Main (30 mins): Teach step-by-step method for percentage change. Apply to prices, profits, losses, and marks. – Plenary (5 mins): Group exercise – students solve shopping discount questions. |
| Resources | Worksheets, calculator, real-life price examples. |
| Time | 40 minutes: 5 (Starter) + 30 (Main) + 5 (Plenary). |
| Homework | Solve 10 increase/decrease problems. |
| Assessment | Worksheet: percentage change exercises. |
| Past Paper Practice | “The cost increases from $240 to $300. Find the percentage increase.” |
Lesson 3: Compound Interest and Repeated Percentage Change
| Section | Details |
|---|---|
| Objective | Calculate compound interest and solve problems involving repeated percentage change. |
| Activities | – Starter (5 mins): Ask: “If $100 earns 10% interest in 1 year, what will it be after 2 years?” – Main (30 mins): Teach compound interest formula and repeated percentage change. Work through examples with savings, population growth, and depreciation. – Plenary (5 mins): Mini test with 3 compound interest questions. |
| Resources | Worksheets, calculator, PowerPoint with formula examples. |
| Time | 40 minutes: 5 (Starter) + 30 (Main) + 5 (Plenary). |
| Homework | Practice 8 compound interest and depreciation problems. |
| Assessment | Worksheet: compound interest and repeated percentage change. |
| Past Paper Practice | “A machine valued at $6000 depreciates 10% each year. Find its value after 3 years.” |
Lesson 4: Reverse Percentages
| Section | Details |
|---|---|
| Objective | Solve reverse percentage problems (find original value given final value and percentage). |
| Activities | – Starter (5 mins): Quick warm-up – “Selling price = $120, profit = 20%. What was cost price?” – Main (30 mins): Teach reverse percentages step by step. Practice profit, loss, and discount problems. – Plenary (5 mins): Class discussion on common mistakes in reverse percentages. |
| Resources | Worksheets, calculator, real-life sales examples. |
| Time | 40 minutes: 5 (Starter) + 30 (Main) + 5 (Plenary). |
| Homework | 10 reverse percentage problems (cost price, selling price, profit/loss). |
| Assessment | Worksheet: reverse percentage calculations. |
| Past Paper Practice | “Find the cost price given selling price $120 and profit = 20%.” |
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