Tirohanga Whānui | Overview
Lesson 3 showed that global food trade creates interdependence. Lesson 4 shows what happens when that dependence is trapped inside a colonial system. In 1845, a blight destroyed Ireland's potato crop — the one food the poorest half of Ireland's 8.4 million people lived on. Around a million died. Over two million left the country in the decade that followed. Many came to Aotearoa. Students learn to distinguish immediate causes (the blight) from structural causes (colonial land tenure, forced food export, deliberate policy), and connect this to modern food sovereignty debates.
Ngā Whāinga Ako | Learning Intentions
- Distinguish between the immediate cause of the famine (blight) and its structural causes (colonial policy).
- Explain why monoculture and dependency increased Irish vulnerability.
- Connect the famine's consequences to Aotearoa New Zealand's Irish community.
Ngā Paearu Angitū | Success Criteria
- Students can name the immediate cause and at least two structural causes of the famine and explain how they interacted.
- Students can explain why a monoculture food system is more vulnerable than a diverse one, using the famine as evidence.
- Students can connect Irish emigration patterns to specific communities in Aotearoa (e.g., Poverty Bay, the West Coast).
Do Now: What Turns a Crop Failure into a Famine?
10 minsWhat it is: A hypothesis-building opener that prepares students to distinguish between a natural event (blight) and a political event (famine). This distinction is the entire lesson's intellectual work.
Run it
- Quick think (2 min): "A disease kills a country's most important crop. Does that automatically cause a famine? What else would need to be true?"
- Pair discussion (4 min): students discuss their conditions. Likely answers: the crop is the only food, other food can't be afforded, help doesn't arrive, borders are closed. Record on the board.
- Frame the lesson (4 min): "In Ireland in 1845, all of those conditions existed — but not because of accident. We're going to find out why." Introduce the distinction: the blight was a crop failure. The famine was a political event.
Watch: What Really Caused the Irish Potato Famine?
12 minsWhat it is: A TED-Ed short that argues the famine was not primarily a natural disaster but a result of colonial land tenure, deliberate food export policy, and British government decisions. Students watch to gather evidence for the cause-analysis activity.
Before watching (2 min)
Ask students to listen for: "Who had the power to change the outcome, and what did they choose to do instead?"
While watching
Students note at least two decisions made by people in power that made the famine worse. These will be used in the cause-analysis activity.
After watching (3 min)
Pair-share notes. Then confirm the key point: throughout the famine, Ireland continued to export food — beef, butter, grain — to Britain. The scarcity was real, but it was also constructed. Ask: "Does that change how we understand the word 'famine'?"
Act 1: Immediate vs Structural Causes
20 minsWhat it is: Students sort and analyse causes using a two-column framework. The intellectual work is distinguishing between what triggered the famine and what structural conditions made it fatal.
Run it
- Frame the analysis (3 min): write on the board — Immediate cause: the event that triggered the crisis. Structural causes: the conditions already in place that determined how bad the crisis became. Use a comparison: "A power cut is an immediate cause. Not having any backup power or food supplies is a structural cause."
- Pair sort (10 min): students complete the Cause & Consequence Chart, sorting these causes into the two columns:
- Phytophthora infestans blight destroyed the potato crop (1845–46)
- Irish tenant farmers were required to pay rent in cash — not food — so they sold their other crops
- Irish land was held by a small landlord class, around a third of them absentees who never lived on their estates and left agents to collect the rent
- Potatoes were the only crop cheap and calorie-dense enough for impoverished tenants to survive on
- The British government adhered to laissez-faire economic policy — refusing to intervene in the food market
- Food exports from Ireland to Britain continued throughout the famine years
- Discussion (7 min): "If even one of the structural causes had been different, would a crop failure still have caused a million deaths? Which structural cause do you think mattered most?" Students justify their choice.
Act 2: The Irish in Aotearoa
10 minsWhat it is: A connection activity that brings the famine's consequences into NZ's own history. Many students' family histories, surnames, and the names of NZ towns trace back to Irish famine migration.
Run it
- Share the connection (3 min): Irish migration to Aotearoa peaked in the 1860s–1880s, driven partly by famine aftermath and land clearances. The West Coast goldfields, Southland, and the Wairarapa have significant Irish-descent communities. Place names: Dunedin's Caversham, New Plymouth's Inglewood, and dozens of street names in Christchurch reflect Irish settlement.
- Local question (4 min): ask students — "Do you know of any Irish surnames or place names in your area? Does anyone in your whānau have Irish heritage?" (No pressure to share; just open the question.)
- Comparative moment (3 min): "The British colonial government exported food from Ireland while people starved. The same British colonial government, in Aotearoa, confiscated Māori land and food supplies in the 1860s. Are these the same kind of structural cause?" Invite brief responses — this is a thinking prompt, not a conclusion to reach in this lesson.
Synthesis: Power and Food Security
15 minsWhat it is: Students write a short analytical piece that connects the famine's structural causes to the broader unit theme: who has power over food systems, and what happens to people who don't?
Run it
- Model the frame (2 min): write on the board — "The Irish Potato Famine was not simply a natural disaster because... The structural cause that mattered most was... This connects to food security today because..."
- Individual writing (10 min): students complete all three frames, using specific evidence from the lesson. Stronger students should add a fourth sentence connecting to either the kūmara lessons (local food sovereignty) or the rice lesson (monoculture risk).
- Pair review (3 min): pairs swap and ask — "Did your partner name a specific structural cause, or just 'the British'?" Push for precision in causal claims.
Exit Ticket: One Cause Claim
5 minsWhat it is: A short claim-evidence check.
Run it
Students complete: "The Irish Potato Famine was caused by more than a blight because ____. One piece of evidence for this is ____." Collect to check who can distinguish immediate from structural causes — this understanding underpins Lessons 5 and 6's trade-off and climate change work.
🎯 Curriculum Alignment
Focus for this lesson: People make decisions that result in change and have consequences for themselves and others.
This is Te Kete Ako's own framing of the lesson's focus, not a quotation from Te Mātaiaho. The unit's verified curriculum statements are on the curriculum alignment page.
This lesson examines a specific set of decisions — by British landlords, the British government, and colonial policy-makers — that turned a crop failure into a catastrophe. Students practice distinguishing between immediate triggers and structural conditions, a key historical thinking skill at Phase 3.
📦 Materials & Resources
- Cause & Consequence Chart
- Source Analysis: Famine Reports (optional extension)
- The TED-Ed video (pre-load and test audio).
📊 Assessment Framework
Formative evidence: completed cause chart, the synthesis writing frame, and the exit-ticket cause claim.
- At support level: students identify the blight as the immediate cause and one structural cause.
- At expected level: students name two structural causes, explain how they interacted with the blight, and use evidence from the video.
- At extension level: students compare the Irish famine's structural causes with either the kūmara response (what would have needed to be different?) or a contemporary food-security situation.
🚀 Extension Activities
Students analyse a contemporary primary source — a letter from an Irish tenant farmer or a British government report from 1847 — using the Source Analysis handout. They identify: author, purpose, what is claimed, what is omitted, and what the source reveals about power.
The Aotearoa parallel: Māori flour mills, 1830s–1870s
A three-part sequence for classes ready to carry this lesson's analytical tools into an Aotearoa case from the same decades. It is deliberately strengths-based — the subject is Māori economic agency and enterprise, not loss — which is why it works as the parallel and distinct example named in the planning snapshot below. Read that note first; this is an option, not a required step.
- Māori Flour Mills Reading Guide — the historical context, with a 1830s–1870s timeline running from early coastal wheat growing, through the 1850s peak of mill construction across Waikato, Bay of Plenty, Taranaki and Hawke's Bay, to raupatu and the end of Māori agricultural dominance.
- Wheat Sales Profit Calculation — the numeracy link, using 1850s–60s prices in pre-decimal currency, with a labourer's daily wage as the comparison point so the figures mean something.
- Flour Adoption Debate Preparation — students argue gain or loss from an assigned position, using the calculations above as evidence.
The analytical move is the same one this lesson teaches: separate the immediate event from the structural conditions. Ask what changed for Māori millers between the 1850s and the 1870s, and whether the cause was agricultural or political.
🔗 Unit Progression
Lesson 3 introduced global food interdependence. Lesson 4 shows what happens when that interdependence is embedded in a colonial power structure. Lesson 5 then asks students to apply economic decision-making tools (trade-offs, opportunity costs) to understand how people make choices under conditions of food scarcity — including the choices available to Irish farmers compared with choices available today.
📋 Teacher Planning Snapshot
Emotional care: some students may have Irish heritage and personal connections to famine history. The lesson is analytical, not traumatic — focus on structural causes and agency, not suffering. Avoid graphic imagery.
Scaffold support: provide the six causes pre-sorted into the chart with student task being to explain each; or provide a frame for the synthesis writing with sentence starters.
ESOL / ELL: pre-teach: blight, tenant, landlord, laissez-faire, structural, consequence. The cause-sort activity works well with visual icons beside each cause.
Mātauranga Māori lens: the colonial comparison (Irish food export / Māori land confiscation) is a thinking prompt, not a conclusion. If your school has strong relationships with mana whenua and explicit permission to explore this, it can be developed. Otherwise, hold it as an open question for students to carry into senior school. Never conflate Irish and Māori experiences — name them as parallel, distinct examples of colonial food-system power.