State of the Planet
Is Our Planet Healthy?
- Subject Area
- Sustainability
- Age Group
- S1–S3 · Ages 11–15
- Estimated Classroom time
- 45 minutes
- Difficulty
- 2 of 3 — Moderate
What does a healthy planet actually look like, and how do we know if it's thriving or under stress?
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Learners map what they already believe about planetary health, then test it against real indicators. You facilitate the discussion rather than supply the answers.
Grab your resources
Session Plan
The full lesson: what pupils will learn, how to run every stage, all activity instructions and answers, and the background you need if the subject is new to you.
Slide Deck
Contains the four landscape images and the five ecosystem scenarios.
Learner journal
One page per learner, printed double-sided.
Island Economy game
A link you share with the class. Runs in a browser, nothing to install.
Got 10 minutes to prep?
Ten minutes is enough. Print the journal, open the slide deck, and run the three beats below.
- Open with the big question and take three answers, unfiltered.
- Show slides 4–7 and let the class sort them into thriving / under stress.
- Close on the one idea: health is a range, not a switch.
Session objectives
Describe what makes an ecosystem healthy in their own words- Compare two ecosystems using at least three indicators
- Explain why a single measure is not enough to judge planetary health
Misconceptions to watch for
“The planet is dying.”
Ecosystems are under stress in measurable, specific ways — but “dying” collapses a range of very different situations into one word and leaves nothing to act on.
Try saying: “Which part, and how would we know if it got better?”
“Recycling fixes it.”
Recycling addresses a narrow slice of material waste and almost none of the energy or land-use picture.
Try saying: “It helps with one thing. What's the biggest thing it doesn't touch?”
If a student asks…
- Is it already too late?
- No — and the honest answer is more useful than a reassuring one. Some changes are locked in; many are not. The distinction is what makes action worth taking.
- Why do scientists disagree?
- They largely don't on the fundamentals. Disagreement clusters around rates and responses, which is normal and is how the picture sharpens.
Got longer?
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Running the full session
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- Starter — the big question, ten minutes.
- Main — the ecosystem sort, twenty minutes.
- Plenary — one idea each, ten minutes.
Extensions
Field guide(opens in a new tab)Extension 1
Map your own patch
Learners apply the same indicators to a place they know — the school grounds, a local park, a stretch of river.
Debate cards(opens in a new tab)Extension 2
Argue the other side
A structured debate where each group defends a position it did not pick.
Curriculum links
- Sciences
- SCN 3-02a — interdependence and the impact of change on an ecosystem.
- Social Studies
- SOC 3-08a — human impact on the environment and the choices communities face.
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