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Week 2 numeracy link after students have analysed the structure and purpose of the storage pit.
Mathematics + social studies • Years 7-8 • Unit 10 Week 2
Rua Kūmara Volume Calculation
Students use measurement and estimation to reason about storage capacity. The mathematical work matters, but so does the bigger idea: better storage systems reduce waste and protect future food supply.
Free measurement task, premium local-data adaptation
This page already works. Te Wānanga becomes useful when you want multiple dimensions, a worked example sequence, or localised storage comparisons built in.
- Generate simplified numbers for support groups.
- Add extension comparisons with modern cold storage or pantry systems.
- Save an adapted Unit 10 maths pack in My Kete.
Kaiako planning snapshot
- Use length: 30-40 minutes.
- Grouping: Individual or paired calculation.
- Prep: Decide whether students use the example dimensions or their own class model.
- Teaching move: Keep linking the answer back to stored kai, time, and scarcity.
Resources already provided
- Measurement table
- Volume formula prompt
- Worked example space
- Context explanation question
- Teacher-only curriculum companion
Support students to explain the answer in words. “The volume is...” is not enough on its own.
Ngā Whāinga Ako / Learning Intentions
- We are learning to calculate volume using dimensions.
- We are learning to estimate storage capacity from a measured space.
- We are learning to connect maths to food security and innovation.
Paearu Angitu / Success Criteria
- I can set up the volume formula correctly.
- I can calculate or estimate capacity from the dimensions given.
- I can explain what the answer means in a Unit 10 scarcity context.
1. Measure or use the example dimensions
| Measurement | Your model | Example storage pit |
|---|---|---|
| Length | __________ | 2.4 m |
| Width | __________ | 1.8 m |
| Depth | __________ | 1.2 m |
2. Use the formula
Volume = length × width × depth
Example: 2.4 m × 1.8 m × 1.2 m = __________________________
Working
Estimated kūmara capacity
If one kūmara takes about 0.001 m³ of space, how many could be stored?
3. Explain the result
Make the maths meaningful
What does this capacity suggest about planning ahead, survival through winter, and the value of innovation in times of scarcity?
Ngā Whāinga Akoranga · Learning Intentions
- Calculate the volume of storage containers — applying geometry to a practical economic problem
- Understand how storage capacity directly determines food security
- Show working clearly — correct answers without working are not complete evidence of understanding
Paearu Angitu · Success Criteria
- I can calculate volume correctly with all steps shown
- I can interpret the result in real-world terms — how many people, for how long?
- I can explain why volume matters economically — connecting geometry to food security
Hononga Marautanga · Curriculum Alignment
Curriculum alignment for this handout has not yet been verified against the live curriculum statements. A generated placeholder that stood here was removed on 2026-08-29 because it matched no real statement.
Whakaaro Hōhonu · Reflection
What is one insight from this activity that connects to the unit's big question: "What Will We Eat Tomorrow?"
Aronga Mātauranga Māori
The ability to calculate volume — of a rua kūmara, a water container, a fishing haul — was practical knowledge that determined whether a community survived the winter. In te ao Māori, mathematical knowledge was embedded in practical necessity: the tohunga waka (canoe builder) understood geometry; the tohunga rua kūmara understood volume and preservation rates. This activity connects numeracy to economic reality: the size of the storage pit determines how many people can be fed through winter. Calculating volume is not an abstract exercise — it is the difference between scarcity and sufficiency.
Ngā Rauemi Tautoko · Support Materials
Resources already provided:
- This handout — Week 2 kūmara and food storage investigation
- Quick Reference Card (unit-10-quick-reference-card.html) — scarcity and trade-off concepts
- Kūmara Grower Diary (unit-10-week2-kumara-grower-diary.html) — track kūmara growth and challenges
- Volume Calculation (unit-10-week2-volume-calculation.html) — calculate food storage capacity
📋 Teacher Planning Snapshot
Ngā Whāinga Ako — Learning Intentions
Students will engage with this resource to investigate the intersection of kai (food), culture, and climate — exploring how mātauranga Māori approaches to food production, preservation, and distribution offer powerful responses to contemporary food security and climate challenges in Aotearoa New Zealand and globally.
Ngā Paearu Angitū — Success Criteria
- ✅ Students can explain how traditional Māori kai practices (maramataka, kūmara cultivation, rāhui) embody ecological knowledge and food security principles.
- ✅ Students can connect kai culture and climate scarcity to contemporary community action and food sovereignty movements.
Differentiation & Inclusion
Scaffold support: Provide graphic organisers that map traditional kai practices to modern food security concepts at the entry level. Offer extension tasks asking students to research a specific iwi's traditional food system and evaluate its contemporary relevance, or to investigate a local food sovereignty initiative.
ELL / ESOL: Pre-teach domain vocabulary (food sovereignty, food security, kaitiakitanga, rāhui, maramataka) using visual diagrams and real-world examples. Draw connections to students' own cultural food traditions — these are valid entry points into the unit's themes. Allow oral or visual presentation of learning as alternatives to written tasks.
Inclusion: Kai is a universal human experience — all students have a relationship with food, seasonality, and sharing. Neurodiverse learners benefit from concrete, hands-on engagement with these concepts (e.g., examining a kūmara, mapping seasonal foods). Acknowledge diverse economic circumstances sensitively when discussing food security. Choice in how students demonstrate understanding (written, visual, oral) supports inclusive assessment.
Mātauranga Māori lens: The maramataka — the Māori lunar calendar — is one of Aotearoa's most sophisticated environmental data systems, encoding centuries of ecological observation about planting, harvesting, fishing, and weather patterns. Kūmara cultivation in pre-colonial Aotearoa was a feat of agricultural knowledge adapted to a new climate. Rāhui (temporary resource restrictions) is indigenous resource management — conservation before conservation. Kaitiakitanga frames the relationship between people and kai not as extraction but as reciprocal guardianship. These are not historical curiosities — they are living solutions to contemporary problems.
Prior knowledge: Students benefit from foundational understanding of climate change and food systems. No specialist mātauranga Māori knowledge required for entry-level engagement — the unit builds this knowledge progressively.