Launch and calculate
How can the same results produce different winners?
Accurate totals, first fairness claim and a shared meaning of evidence.
Year 7 Mathematics · 4 weeks · 16 lessons
Is our sports carnival fair?
A KSHS WSIM learning sequence using one rich decision problem to connect calculation, fractions-decimals-percentages, ratios, statistics, probability and mathematical modelling.
12 core lessons4 numeracy lessons1 written recommendation
Unit pathway
One question, four deliberate stages
Participation and proportional fairness
How can house size and participation be compared fairly?
FDP, equivalent ratios and a defensible participation component.
Weighting, chance and evidence
What happens when team events or random bonuses carry more weight?
Weighted calculations, probability simulation and summary statistics.
Design, test and justify
Can our system survive difficult test cases?
A written, evidence-based recommendation for a fair points system.
Assessment
Sports Carnival Review Team written recommendation
Developed across Lessons 13-15; submitted in Lesson 15
- A complete and reproducible points system
- Accurate calculations for the opening dataset
- A percentage or equivalent-ratio comparison
- At least three stress tests, including one house-size or boundary case
- A written claim, reasoning and acknowledged limitation
Evidence teachers can collect
1Mathematical accuracy
2Appropriate representations and Year 7 content
3Quality of modelling, assumptions and constraints
4Use of evidence to justify fairness
5Clear written mathematical communication
Planning notes
The unit uses the revised SCSA Western Australian Curriculum: Mathematics for implementation in 2026. The current curriculum is mapped by strand, sub-strand and content description rather than legacy ACMNA/ACMSP codes.
Ready, Set, OLNA © Mathematical Association of Western Australia 2025. The four interleaved sets use new sports-carnival contexts and values, informed by the named support-lesson structures in the supplied resource.