# Primary 2 Maths Lesson Plan: Teaching Length and Measurement in Metres and Centimetres Mathematics Primary 2 Third Term Lesson Notes Week 5

#### Subject: Mathematics

#### Class: Primary 2

#### Term: Third Term

#### Week: 5

#### Topic: Length

#### Sub-topic: Measurement in Metres and Centimetres

#### Duration: 40 minutes

#### Behavioural Objectives:

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

- Define length.
- Identify units of length (metres and centimetres).
- Convert between metres and centimetres.
- Measure objects using a ruler or measuring tape.
- Solve problems involving length.

#### Keywords:

- Length
- Metres (m)
- Centimetres (cm)

#### Entry Behaviour:

Pupils are familiar with measuring short objects using a ruler.

#### Learning Resources and Materials:

- Metre sticks and rulers (30 cm)
- Measuring tape
- Objects of different lengths (e.g. toy cars, pencils, ribbons)
- Chart paper
- Marker

#### Building Background/Connection to Prior Knowledge:

Review the previous lesson on measuring short objects using a ruler. Ask pupils how long different objects are.

#### Embedded Core Skills:

- Problem-solving
- Critical thinking
- Measurement skills

#### Reference Books:

- Lagos State Scheme of Work
- Primary 2 Mathematics Textbook

#### Instructional Materials:

- Metre sticks
- Rulers (30 cm)
- Objects of different lengths (e.g. toy cars, pencils, ribbons)
- Chart paper
- Marker

#### Content:

- Definition of length and units of length (metres and centimetres).
- Conversion between metres and centimetres.
- Measuring objects using rulers and metre sticks.
- Solving problems involving length.

**Length**

Length is how long or short an object is. It can also tell you how wide an object is. We compare objects to see which one is longer, shorter, or the same size.

Here are some examples of comparing objects:

- ✏ Pencil A is longer than pencil B.
- 🚢 Ship A is shorter than Ship B.

Now, let’s practice!

**Class-Work**

- 🎂 Cake A and 🥞 Pancake B
*Cake A is taller than Pancake B.* - ☕ Cup A and 🍵 Teacup B
*Teacup B is smaller than Cup A.* - 🏐 Ball A and ⚽ Ball B
*Ball A is the same size as Ball B.* - 🚌 Bus A and 🚕 Car B
*Bus A is bigger than Car B.* - 📻 Radio A and 📟 Walkie-Talkie B
*Walkie-Talkie B is smaller than Radio A.* - 💿 Disk A and 💽 Disk B
*Disk B is smaller than Disk A.*

**Length**

Length tells us how long something is. We can measure length in **metres (m)** and **centimetres (cm)**.

**Example 1:****Given:**A rope is 5 metres long.**What is the length in centimetres?****Answer:**5 metres × 100 = 500 centimetres

**Example 2:****Given:**A pencil is 20 centimetres long.**What is the length in metres?****Answer:**20 centimetres ÷ 100 = 0.2 metres

**Example 3:****Given:**A playground is 10 metres long.**What is the length in centimetres?****Answer:**10 metres × 100 = 1000 centimetres

**Example 4:****Given:**A book is 30 centimetres long.**What is the length in metres?****Answer:**30 centimetres ÷ 100 = 0.3 metres

**Example 5:****Given:**A table is 2 metres long.**What is the length in centimetres?****Answer:**2 metres × 100 = 200 centimetres

**Example 6:****Given:**A ribbon is 150 centimetres long.**What is the length in metres?****Answer:**150 centimetres ÷ 100 = 1.5 metres

**Example 7:****Given:**A path is 12 metres long.**What is the length in centimetres?****Answer:**12 metres × 100 = 1200 centimetres

**Example 8:****Given:**A toy is 25 centimetres long.**What is the length in metres?****Answer:**25 centimetres ÷ 100 = 0.25 metres

**Example 9:****Given:**A line is 7 metres long.**What is the length in centimetres?****Answer:**7 metres × 100 = 700 centimetres

**Example 10:****Given:**A ruler is 35 centimetres long.**What is the length in metres?****Answer:**35 centimetres ÷ 100 = 0.35 metres

**Example 11:****Given:**A cloth is 4 metres long.**What is the length in centimetres?****Answer:**4 metres × 100 = 400 centimetres

**Example 12:****Given:**A scarf is 90 centimetres long.**What is the length in metres?****Answer:**90 centimetres ÷ 100 = 0.9 metres

**Example 13:****Given:**A playground is 14 metres long.**What is the length in centimetres?****Answer:**14 metres × 100 = 1400 centimetres

**Example 14:****Given:**A stick is 45 centimetres long.**What is the length in metres?****Answer:**45 centimetres ÷ 100 = 0.45 metres

**Example 15:****Given:**A rope is 9 metres long.**What is the length in centimetres?****Answer:**9 metres × 100 = 900 centimetres

Class Activity Discussion :

- The unit used to measure the length of a pencil is:
- a.
**Metres** - b. Kilometres
- c.
**Centimetres** - d. Yards

- a.
- How many centimetres are in 1 metre?
- a. 50
- b.
**100** - c. 10
- d. 200

- The length of a long jump can be measured in:
- a.
**Metres** - b. Centimetres
- c. Millimetres
- d. Yards

- a.
- A standard ruler is usually:
- a. 1 metre long
- b.
**30 centimetres long** - c. 100 centimetres long
- d. 20 metres long

- A small toy car might be measured in:
- a. Metres
- b. Kilometres
- c.
**Centimetres** - d. Inches

- To convert 200 centimetres to metres, you:
- a. Multiply by 10
- b.
**Divide by 100** - c. Add 200
- d. Multiply by 100

- To measure a classroom, you would use:
- a.
**Metres** - b. Millimetres
- c. Centimetres
- d. Kilometres

- a.
- 3 metres is equal to:
- a.
**300 centimetres** - b. 30 centimetres
- c. 3000 centimetres
- d. 3 centimetres

- a.
- The length of a swimming pool might be measured in:
- a. Kilometres
- b.
**Metres** - c. Centimetres
- d. Millimetres

- 1 metre is equal to how many centimetres?
- a. 1000
- b.
**100** - c. 10
- d. 1

- A line that is 50 centimetres long is:
- a. 0.5 metres
- b. 5 metres
- c.
**0.5 metres** - d. 500 metres

- To measure the length of a hallway, you would use:
- a.
**Metres** - b. Millimetres
- c. Inches
- d. Yards

- a.
- The length of a piece of string can be measured in:
- a. Metres
- b.
**Centimetres** - c. Kilometres
- d. Millimetres

- 200 centimetres is equal to how many metres?
- a.
**2 metres** - b. 20 metres
- c. 0.2 metres
- d. 2000 metres

- a.
- What would you use to measure the length of a football field?
- a.
**Metres** - b. Centimetres
- c. Millimetres
- d. Kilometres

- a.