Measurements

Temperature - Temperature in our environment

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

- Define temperature as degree of hotness or coldness
- Describe temperature conditions as warm, hot or cold
- Show interest in learning about temperature

- Take walk outside classroom and observe temperature
- Discuss temperature conditions as warm, hot or cold
- Record temperature changes at different times of day

What is temperature?

- Smart Minds Mathematics Learner's Book pg. 149
- Thermometers
- Charts

- Oral questions - Written exercises - Observation

Measurements

Temperature - Comparing temperature

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

- Compare temperature of different objects
- Use warmer, colder, hotter to compare temperature
- Appreciate the importance of temperature in daily life

- Shake hands with partner and compare warmth
- Compare coldness of tap water and ice cubes
- Compare temperature of metallic and wooden objects

How do we compare temperature?

- Smart Minds Mathematics Learner's Book pg. 150
- Ice cubes
- Metallic and wooden objects

- Written assignments - Class activities - Oral questions

Measurements

Temperature - Units of measuring temperature

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

- Identify Celsius (°C) and Kelvin (K) as units of temperature
- Read temperature from thermometers
- Show confidence in reading temperature

- Visit health centre to see thermometer
- Identify °C and K symbols on thermometer
- Measure water temperature before and after heating

What are the units of measuring temperature?

- Smart Minds Mathematics Learner's Book pg. 151
- Thermometers
- Sufuria, water

- Written exercises - Oral questions - Observation

Measurements

Temperature - Converting °C to Kelvin

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

- State the relationship between °C and Kelvin
- Convert temperature from degrees Celsius to Kelvin
- Value accuracy in temperature conversions

- Measure water temperature before heating and at boiling point
- Compare readings in °C and Kelvin
- Establish: Kelvin = °C + 273

How do we convert degrees Celsius to Kelvin?

- Smart Minds Mathematics Learner's Book pg. 153
- Thermometers
- Calculators

- Written assignments - Class activities - Oral questions

Measurements

Temperature - Converting Kelvin to °C

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

- Explain conversion of Kelvin to degrees Celsius
- Convert temperature from Kelvin to degrees Celsius
- Appreciate the use of temperature conversions

- Complete table showing daily temperatures in Kelvin
- Convert to °C by subtracting 273
- Solve problems about melting points and town temperatures

How do we convert Kelvin to degrees Celsius?

- Smart Minds Mathematics Learner's Book pg. 154
- Temperature tables
- Calculators

- Written exercises - Oral questions - Observation

Measurements

Temperature - Temperature changes

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

- Calculate rise or drop in temperature
- Solve problems involving temperature changes
- Show interest in temperature changes in daily life

- Record temperature at different times (8:00 a.m., 2:00 p.m.)
- Calculate temperature rise: Final temp - Initial temp
- Calculate temperature drop: Initial temp - Final temp

How do we calculate temperature changes?

- Smart Minds Mathematics Learner's Book pg. 155
- Thermometers
- Digital devices

- Written assignments - Class activities - Oral questions

Measurements

Money - Profit

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

- Define profit in business transactions
- Calculate profit given buying and selling prices
- Show interest in calculating profit

- Role-play shopping activities using classroom shop
- Compare buying price and selling price
- Establish: Profit = Selling price - Buying price

What is profit in business?

- Smart Minds Mathematics Learner's Book pg. 157
- Classroom shop
- Paper money

- Oral questions - Written exercises - Observation

Measurements

Money - Loss

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

- Define loss in business transactions
- Calculate loss given buying and selling prices
- Appreciate the importance of avoiding loss in business

- Compare buying price and selling price in tables
- Identify when selling price is lower than buying price
- Establish: Loss = Buying price - Selling price

What is loss in business?

- Smart Minds Mathematics Learner's Book pg. 159
- Price tables
- Charts

- Written assignments - Class activities - Oral questions

Measurements

Money - Percentage profit

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

- Define percentage profit
- Calculate percentage profit
- Show confidence in calculating percentage profit

- Draw tables with buying price, selling price and profit
- Work out percentage profit = (Profit ÷ Buying price) × 100%
- Solve problems about shirts, books and goods

How do we calculate percentage profit?

- Smart Minds Mathematics Learner's Book pg. 160
- Tables
- Calculators

- Written exercises - Oral questions - Observation

Measurements

Money - Percentage loss

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

- Define percentage loss
- Calculate percentage loss
- Value the importance of minimizing loss in business

- Draw tables with buying price, selling price and loss
- Work out percentage loss = (Loss ÷ Buying price) × 100%
- Solve problems about mattresses, dresses and sheep

How do we calculate percentage loss?

- Smart Minds Mathematics Learner's Book pg. 162
- Tables
- Calculators

- Written assignments - Class activities - Oral questions

Measurements

Money - Discount

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

- Define discount as reduction from marked price
- Calculate discount given marked price and selling price
- Appreciate the benefit of discounts to buyers

- Read story of Regina bargaining for shoes in shop
- Establish: Discount = Marked price - Selling price
- Solve problems about blouses, blankets and bicycles

What is a discount?

- Smart Minds Mathematics Learner's Book pg. 164
- Price tags
- Charts

- Written exercises - Oral questions - Observation

Measurements

Money - Percentage discount

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

- Define percentage discount
- Calculate percentage discount
- Show interest in calculating discounts

- Complete tables with marked price, selling price and discount
- Work out percentage discount = (Discount ÷ Marked price) × 100%
- Solve problems about motorcycles, cars and blankets

How do we calculate percentage discount?

- Smart Minds Mathematics Learner's Book pg. 166
- Tables
- Calculators

- Written assignments - Class activities - Oral questions

Measurements

Money - Commission and percentage commission

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

- Define commission as payment for selling goods
- Calculate commission and percentage commission
- Value the role of commission in business

- Read story of Mzee Mambo Leo's motor vehicle firm
- Study table showing Dansam's weekly commission
- Calculate: % Commission = (Commission ÷ Value of goods sold) × 100%

What is commission in business?

- Smart Minds Mathematics Learner's Book pg. 167
- Commission tables
- Calculators

- Written exercises - Oral questions - Observation