Numbers to 10,000 · Semester 1

Place Value: Thousands, Hundreds, Tens, and Ones

Students will identify the value of each digit in a four-digit number and regroup numbers in different ways using place value.

About This Topic

This topic focuses on the three essential requirements for the survival of living things: air, food, and water. Students explore how different organisms obtain these needs and the consequences when these needs are not met. In the Singapore context, this links to our focus on environmental stewardship and understanding our local biodiversity. It builds a foundation for later topics like food chains and life cycles.

Students learn that while all living things share these needs, the methods of acquisition vary. For example, plants make their own food while animals must consume other organisms. Students grasp this concept faster through structured investigation and observing real-life examples in the school garden or eco-pond.

Active Learning Ideas

Inquiry Circle: The Thirsty Plant

Groups observe two similar potted plants, providing water to one and withholding it from the other. They record daily changes and present their findings to the class to explain the importance of water.

⏱ 30 min·Small Groups

Generate mission

Gallery Walk: Survival Kits

Students draw 'survival kits' for different animals (e.g., an otter in the Singapore River). They must include sources of air, food, and water, then walk around to critique if their peers' kits are realistic.

⏱ 40 min·Individual

Generate mission

Think-Pair-Share: Air Underwater

Teachers show a video of a fish and a whale. Pairs discuss how each animal gets its air, helping them understand that 'air' is needed even by creatures living in water.

⏱ 15 min·Pairs

Generate mission

Watch Out for These Misconceptions

Common Misconception

Plants get their food from the soil.

What to Teach Instead

Soil provides minerals and water, but plants make their own food in their leaves using sunlight. Using a role play where students act as leaves 'cooking' food helps correct this common error.

Common Misconception

Insects do not need air because they are so small.

What to Teach Instead

All animals, including insects, need air. Observing insects through a magnifying glass or using diagrams of spiracles helps students understand that breathing happens in different ways.

Frequently Asked Questions

What are the best hands-on strategies for teaching the needs of living things?

Direct observation is most effective. Setting up terrariums or simple plant experiments allows students to see the immediate impact of deprivation. Using collaborative problem-solving, like designing a habitat for a classroom pet, requires students to apply their knowledge of air, food, and water needs in a practical, high-stakes way.

How do plants 'breathe' if they don't have lungs?

Plants exchange gases through tiny openings in their leaves called stomata. You can explain this by comparing stomata to tiny windows that open and close to let air in and out.

Can living things survive without food for a long time?

Some organisms have adaptations to survive longer without food, like camels storing fat. However, eventually, all living things need energy from food to stay alive and grow.

Why is water so important for all living things?

Water is needed for many body processes, like digestion and transporting nutrients. In plants, water also helps them stay upright. Without it, the systems that keep an organism alive will stop working.

Browse curriculum by country

• Americas
• US
• CA
• MX
• CL
• CO
• BR

• Europe
• UK
• IE
• FR
• DE
• ES
• IT
• NL
• PT
• SE

• Asia & Pacific
• IN
• SG
• AU