Rights, Duties, and Ethical Choices · Semester 1

When Rights Conflict

Exploring scenarios where one person's rights might conflict with another's, and how to resolve such tensions.

About This Topic

Fungi and bacteria represent a unique group of organisms that are neither plants nor animals. This topic focuses on their role as decomposers, breaking down dead matter and returning nutrients to the soil. Students learn that fungi reproduce via spores and do not make their own food, while bacteria are microscopic organisms that can be both helpful and harmful.

In the Singapore Science curriculum, this topic highlights the importance of the 'recyclers' in our ecosystem. From the mushrooms appearing after a rainstorm to the bacteria used in making yogurt, these organisms are everywhere. This topic particularly benefits from hands-on observation and structured discussion to dispel the idea that all 'germs' are bad.

Active Learning Ideas

Inquiry Circle: The Moldy Bread Race

Students place bread in different conditions (damp vs. dry, warm vs. cold) and observe which grows mold (a fungus) faster, recording their findings over a week.

⏱ 30 min·Small Groups

Generate mission

Gallery Walk: Helpful vs. Harmful Bacteria

Students research one 'good' bacterium (e.g., in yogurt) and one 'bad' bacterium (e.g., causing a sore throat). They create posters to show that bacteria have many roles.

⏱ 45 min·Pairs

Generate mission

Think-Pair-Share: The World Without Decomposers

Pairs discuss what would happen to all the fallen leaves and dead animals in a forest if there were no fungi or bacteria. They share their 'messy' predictions with the class.

⏱ 15 min·Pairs

Generate mission

Watch Out for These Misconceptions

Common Misconception

Fungi are a type of plant.

What to Teach Instead

Fungi cannot make their own food and do not have leaves or roots. Comparing a mushroom to a green plant in a T-chart helps students see that fungi get food from what they grow on.

Common Misconception

All bacteria are 'germs' that make us sick.

What to Teach Instead

Many bacteria are helpful, like those in our gut that help us digest food. Using a 'sorting activity' of bacterial roles helps students understand the balance between helpful and harmful types.

Frequently Asked Questions

How can active learning help students understand fungi and bacteria?

Since bacteria are invisible and fungi are often misunderstood, active learning through experiments like the 'moldy bread' investigation makes the invisible visible. Collaborative discussions about the 'recycling' role of decomposers help students move beyond the 'yuck' factor and appreciate the ecological necessity of these organisms. Role-playing the process of decomposition can also help them visualize how nutrients return to the soil.

How do fungi reproduce?

Fungi reproduce by releasing millions of tiny spores into the air. When these spores land on a suitable surface with food and moisture, they grow into new fungi.

Is yeast a fungus?

Yes, yeast is a single-celled fungus. It is very helpful to humans because we use it to make bread rise and to brew certain drinks.

Why should we not touch wild mushrooms?

While many mushrooms are harmless, some are very poisonous. It is hard to tell them apart just by looking, so it is a safety rule to never touch or eat wild mushrooms.

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