WHENUA & POWER · MISSION 04

MIGRATION MAP

YEAR 8 · TERM 2 · WEEK 4

Population Shift

What changes when populations grow, shrink or move?

DEMOGRAPHY CONTROL: Two fictional countries have the same total population but very different age structures. Change one variable at a time, watch the population pyramid respond, and decide what the shape can — and cannot — tell you about future needs.

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MISSION DECKWHENUA & POWER / WEEK 04SELECT A MODULE

01BRIEFMission

02LEARNIntel

03INVESTIGATEEvidence

04ENGLISHEvidence case

05DECIDEMake the call

06DATANumbers

07PROJECTBuild

08CHECK-INReflect

★GAMEReward

ACTIVE OBJECTIVEDEMOGRAPHY CONTROL: Two fictional countries have the same total population but very different age structures. Change one variable at a time, watch the population pyramid respond, and decide what the shape can — and cannot — tell you about future needs.

WORLDWHENUA & POWER

SEQUENCE01 / 08

REWARDGAME BREAK

Jump to a lesson part

READY?

Watch. Check the clues. Have a go.

Everything you need is on this page.

Start mission →

Need help getting started?

YOU NEED

Required: a device with this page open.
Optional: headphones for video or read-aloud.
Optional: pen + paper for rough working if that helps you think.

HOW TO DO IT

Read or listen to the Briefing + Learn.
Do the interactive mission.
Use facts from the reading and maths parts.
Make your choice and save your project step.
Play the weekly game. Finish Check-in.

WORK YOUR WAY

Short bursts are fine. Use Learning Tools for easier reading, read-aloud, less on screen, stronger contrast, no-rush and quieter-screen options.

If you get stuck, look at the example and try again.

MISSION BRIEFING

DEMOGRAPHY CONTROL: Two fictional countries have the same total population but very different age structures. Change one variable at a time, watch the population pyramid respond, and decide what the shape can — and cannot — tell you about future needs.

✓Read the broad shape of a population pyramid without treating it as a complete story.

✓Explain how birth rates, death rates and migration can change population structure over time.

✓Use ratios and percentages to compare age groups.

✓Predict possible service pressures while naming at least one uncertainty or missing factor.

INTERACTIVE LEARN MODE

No passive video this week.

This mission is deliberately built around its simulator, investigation, decision room or prototype instead of an external video.

LEARN

STRUCTURE → DRIVER → SHIFT → LIMIT

Population structure changes when births, deaths and migration change. A wide younger base usually means a large share of children and young people; a narrower base with larger older groups can indicate an ageing population. The demographic-transition model describes a common long-term shift from high birth and death rates toward lower rates as societies change, but real countries do not all follow one identical path. Migration can also reshape particular age groups quickly. A population pyramid is useful evidence, but it cannot by itself explain why a pattern exists or exactly what will happen next.

LEARNING BUILD

Learn it. See it. Try it.

Look at the example. Check another point of view. Then try the task.

Step 1: Choose a starting clue

WHAT YOU ALREADY KNOW

Reasoning lens:SOURCE → PROVENANCE → MECHANISM / POWER → COUNTER-EVIDENCE → LIMIT → JUDGEMENT

What do you already know?

English / communication:Synthesis across text, graph and population structure; evidence-led explanation.

Maths / data:Rates, percentages, ratio, time series and population pyramids.

Topic knowledge:Birth/death rates, demographic transition, age structure, migration and effects on services/resources.

This week’s first target:Read the broad shape of a population pyramid without treating it as a complete story.

Which clue is a good place to start?

Choose a source that can directly support part of the investigation. More than one source may be useful, but start with evidence that does not outrun its support.

Need more help? See the teaching

TEACH 1 · CORE MODEL

TEACH 2 · WHAT TO NOTICE

Read the broad shape of a population pyramid without treating it as a complete story.Explain how birth rates, death rates and migration can change population structure over time.

TEACH 3 · CONNECT + TRANSFER

Use ratios and percentages to compare age groups. Predict possible service pressures while naming at least one uncertainty or missing factor.

WORKED EXAMPLE · EVIDENCE

FICTIONAL COUNTRY KŌWHAI

Age structure: 0–14 = 24%, 15–64 = 66%, 65+ = 10%. Net migration is slightly positive and concentrated among working-age adults.

Reasoning: Start with exactly what the source establishes. Connect it to the relevant concept, then stop before the claim becomes broader than the evidence. Now compare it with MODEL NOTE · births: If birth rates remain lower for a long period, younger age groups can become smaller relative to older groups, all else equal.

Why caution still matters:This item is useful context, but context is not the same as direct proof. Combine it with stronger evidence before making a broad conclusion.

WORKED EXAMPLE · MATHS / DATA ROUTE

In fictional Country Kōwhai, 24% of the population is aged 0–14 and 10% is aged 65+. What is the simplest ratio of the younger group to the 65+ group?

This week’s maths/data focus:Rates, percentages, ratio, time series and population pyramids.

Identify the dates, quantities, denominator or map scale first. Calculate carefully, then return the number to its historical or geographic context. A correct number does not explain the whole story by itself.

WE DO · GUIDED PRACTICE

Which source needs the most caution before it is used to support a broad conclusion?

Choose a source that mainly supplies context rather than direct proof of the whole conclusion.

YOU TRY · INDEPENDENT PRACTICE

For Population Shift, explain one core idea, connect it to one named source or observation and one quantitative/data point from this page, then state an alternative explanation, trade-off or limitation that a strong judgement must consider.

Write at least 30 words. Name the evidence or data you are using and keep the claim inside what it can support.

MISCONCEPTION CHECK

MODEL NOTE · births:If birth rates remain lower for a long period, younger age groups can become smaller relative to older groups, all else equal.

This item is useful context, but context is not the same as direct proof. Combine it with stronger evidence before making a broad conclusion.

HELP

Try: “Source/provenance ___ supports ___. A competing interpretation is ___. The strongest limitation is ___. Therefore my judgement is ___.”

STRETCH · OPTIONAL

Build the strongest reasonable counter-argument or alternative explanation. Name one additional piece of evidence that could distinguish between the two positions.

DEMOGRAPHY CONTROL

Same total population. Different shape.

Compare two fictional population structures, then change one variable at a time and watch which age groups respond.

COUNTRY KŌWHAIyounger structure

0–14

24%

15–64

66%

65+

10%

Choose a scenario. The simulator will show a simplified directional change, not a real forecast.

MODEL LIMIT

What can a population pyramid NOT tell you by itself?

Test all three scenarios and solve the model-limit check.

OPEN THE SOURCE NOTES

SOURCE 1

FICTIONAL COUNTRY KŌWHAI

Age structure: 0–14 = 24%, 15–64 = 66%, 65+ = 10%. Net migration is slightly positive and concentrated among working-age adults.

SOURCE 2

FICTIONAL COUNTRY RIMU

Age structure: 0–14 = 15%, 15–64 = 61%, 65+ = 24%. Birth rates have been low for many years and life expectancy is high.

SOURCE 3

MODEL NOTE · births

If birth rates remain lower for a long period, younger age groups can become smaller relative to older groups, all else equal.

SOURCE 4

MODEL NOTE · migration

Migration can change population size and age structure quickly when arrivals or departures are concentrated in particular age groups.

SOURCE 5

LIMITATION

Age structure alone does not tell us income, health status, housing supply, productivity, policy choices or exact future behaviour.

INVESTIGATE + ENGLISH · EVIDENCE CASE

A pyramid is a clue, not a prophecy

Imagine two fictional countries with the same total population. Country Kōwhai has 24% of its population under 15 and 10% aged 65 or over. Country Rimu has 15% under 15 and 24% aged 65 or over. Those shapes suggest different possible pressures: Kōwhai may need relatively more school places over the near term, while Rimu may need relatively more services used by older people. But those are evidence-based possibilities, not guarantees. Migration, productivity, health, housing, government choices and future birth rates could all change the outcome. Population data are strongest when the shape is combined with other evidence.

BUILD THE EVIDENCE CASE · CLAIM → EVIDENCE → REASONING

MAKE THE CALL

Run three simulator changes — lower births, higher life expectancy, and working-age inward migration. For each, record which part of the pyramid changes most and one possible implication. Finish by naming one thing the model cannot predict.

BUILD YOUR CASE CONCLUSION1. Make the call. 2. Use at least two relevant pieces of evidence. 3. Explain one limitation or uncertainty. 4. Finish with what can responsibly be concluded.Strong structure: My judgement is… The strongest evidence is… However, we still do not know… Therefore…

CASE CONCLUSION: Write 200–270 words comparing fictional Countries Kōwhai and Rimu. Use the age-structure percentages, explain one likely service pressure for each, describe how migration could change the pattern, and include one limitation that prevents the pyramid from becoming a prediction.

YOUR REASONING

0/200 words minimum for this writing mission.

CLAIMEVIDENCELIMITATIONCONCLUSION

MATHS + DATA LAB

Check the numbers.

HOW TO SUCCEEDRead the situation first. Estimate what a sensible answer should look like, choose an efficient calculation, then use the feedback to check your reasoning.For data questions, explain what the number shows — and what it does not prove.

In fictional Country Kōwhai, 24% of the population is aged 0–14 and 10% is aged 65+. What is the simplest ratio of the younger group to the 65+ group?

Estimate first, then choose the answer.

MISSION 05 · MATHS + DATA LAB

DATA TRAINING

NUMBER · YEAR 8 EXTENSION

6 PROBLEMS

QUICK METHODNUMBER

Estimate first, choose an efficient operation, then check whether the answer is reasonable.

GUIDED · Q01–Q03Use the quick method, then check the explanation.

Q01

26 × 9 = ?

Q02

234 ÷ 9 = ?

Q03

35 − 9 = ?

INDEPENDENT · Q04

Which is greatest?

INDEPENDENT · Q05

Estimate 26 × 9 to the nearest ten.

INDEPENDENT · Q06

A total of 234 is shared equally among 9 groups. Each group gets…

OPTIONAL CHALLENGE · OPEN RESPONSE

Find two different calculations that produce the same answer as one question above, then justify why both are valid.

0 words · optional

PROJECT HQ · PROJECT FILE 04

SOURCES — evaluate data and source limits.

Start something real. Build an idea, test it, improve it, and share it. Make your move.

Your Power & Place case study begins now. Choose a question about rights, institutions, reform or place that can be tested against varied evidence and competing perspectives.

PROJECT HQ · PROJECT FILE 04

SOURCES

PROJECT JOURNEYWEEK 4 / 9

Record what each source can and cannot carry in the final interpretation.

Need help with this step?

THIS WEEKSOURCES

Complete only this project step today. Your saved work carries forward, so you do not need to finish the whole project at once.

A STRONG STEPSpecific · useful · achievable

Use evidence from this week's mission, name a real audience or purpose, and make the idea small enough to test and improve.

BEFORE YOU SAVE, CHECK:✓ I answered every field clearly✓ I used evidence or reasoning from this week✓ My next step is realistic

WHAT THE SOURCES ESTABLISHWHERE THEY DIFFERLIMIT

Write in each box. Your answers save on this device as you type.

IDEA→RESEARCH→PLAN→BUILD→TEST→IMPROVE→PRESENT

Project sharing will be optional. A future upload system must keep private submission separate from public-showcase/marketing permission.

CHECK-IN

What changed in your thinking?

One thing I learned or questioned

YEAR 8 · REMIX · TERM 2 / WEEK 4

STRIKE LAB

Build a ten-frame score with real strike and spare pressure.

UPGRADED DIFFICULTYBEST SCORE SAVED

PLAY STRIKE LAB

A remastered ICONIC GAMES favourite · phone + keyboard controls.