Scientific Inquiry and the Natural World · 5th Class

Active learning ideas

Ecosystems and Food Webs

Active learning helps students visualize the invisible threads that connect organisms in an ecosystem. When students manipulate cards, role-play roles, or explore their surroundings, they move beyond abstract definitions to see firsthand how energy flows and relationships form.

• NCCA Curriculum Specifications
• NCCA: Primary - Living Things
• NCCA: Primary - Environmental Awareness

• 30–50 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Jigsaw
• 35 min · Small Groups

Card Sort: Building Local Food Webs

Provide cards with local Irish species like oak trees, rabbits, foxes, and earthworms labeled by role. In small groups, students sort cards into producers, consumers, and decomposers, then connect them with yarn to form a food web. Discuss energy flow paths.

Analyze the flow of energy through a local food web.

Facilitation Tip

During the Card Sort, circulate to listen for students’ justifications when they place cards, asking clarifying questions like, 'Why did you connect the hawk to the squirrel and not the oak tree?'

What to look for

Provide students with a list of organisms found in a local park (e.g., oak tree, squirrel, hawk, mushroom, earthworm). Ask them to write down the role of each organism (producer, consumer, decomposer) and draw arrows between at least three organisms to show a simple food chain.

• Understand
• Analyze
• Evaluate
• Relationship Skills
• Self-Management

Activity 02

• Jigsaw
• 45 min · Whole Class

Role-Play: Keystone Species Disruption

Assign roles to students as ecosystem members. One group removes the 'keystone' actor, such as a hawk, and the class acts out chain reactions on population changes. Record predictions versus outcomes on charts.

Differentiate between a habitat and a niche.

Facilitation Tip

In the Role-Play activity, model neutral body language for the 'keystone species' so students focus on the ecosystem’s reaction rather than personal performance.

What to look for

Pose the question: 'Imagine all the earthworms suddenly disappeared from our local ecosystem. What might happen to the plants? What might happen to the animals that eat earthworms?' Facilitate a class discussion, guiding students to consider the roles of decomposers and the ripple effects through the food web.

• Understand
• Analyze
• Evaluate
• Relationship Skills
• Self-Management

Activity 03

• Jigsaw
• 50 min · Pairs

Schoolyard Habitat Survey

Students survey the school grounds for habitats like hedges or ponds, noting organisms and their niches. Sketch simple food webs based on observations and classify roles. Share findings in a class gallery walk.

Predict the impact of removing a keystone species from an ecosystem.

Facilitation Tip

For the Schoolyard Habitat Survey, provide clipboards and colored pencils, and remind students to record not just what they see but also where and when they see it.

What to look for

On a small card, ask students to write the definition of 'habitat' in their own words and give an example of a habitat for a bird. Then, ask them to write the definition of 'niche' and describe the niche of the same bird, including what it eats and where it lives.

• Understand
• Analyze
• Evaluate
• Relationship Skills
• Self-Management

Activity 04

• Jigsaw
• 30 min · Small Groups

Energy Flow Dominoes

Line up dominoes representing trophic levels with local examples. Topple to show energy transfer and discuss loss at each step. Groups modify setups to test keystone removal effects.

Analyze the flow of energy through a local food web.

Facilitation Tip

Use Energy Flow Dominoes to physically demonstrate how energy moves through an ecosystem by having students trace the path aloud as they play.

What to look for

Provide students with a list of organisms found in a local park (e.g., oak tree, squirrel, hawk, mushroom, earthworm). Ask them to write down the role of each organism (producer, consumer, decomposer) and draw arrows between at least three organisms to show a simple food chain.

• Understand
• Analyze
• Evaluate
• Relationship Skills
• Self-Management

A few notes on teaching this unit

Teachers often introduce ecosystems by asking students to list organisms, but this overlooks the dynamic interactions at the core of the topic. Start with a simple scenario, like a fallen apple in a forest, and have students brainstorm who depends on it. Avoid rushing to definitions—instead, let students discover roles through exploration. Research shows that when students construct their own models, they retain concepts longer and transfer knowledge to new contexts.

Successful learning shows when students can explain how energy transfers between organisms and predict outcomes when parts of the system change. Listen for precise language about producers, consumers, and decomposers, and watch for accurate connections in their work.

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Watch Out for These Misconceptions

• During Card Sort: Building Local Food Webs, watch for students arranging organisms in straight lines without branches.

  Prompt students to rearrange their cards by asking, 'Could one animal eat more than one type of food? Could one plant be eaten by multiple animals?' Encourage them to redraw connections until the web reflects multiple pathways.

• During Role-Play: Keystone Species Disruption, watch for students assuming all consumers hunt and kill.

  Have students observe peers during the role-play and list examples of herbivores or scavengers. Ask them to describe how these consumers acquire energy without hunting.

• During Role-Play: Keystone Species Disruption, watch for students believing one species’ loss has minimal impact.

  After the simulation, ask groups to report how the ecosystem changed when their assigned species was removed. Draw arrows on the board to show ripple effects, highlighting cause and effect.

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Methods used in this brief

• Jigsaw