
Session 1 · SOLVE: See the Pattern
Claims, questions and predictions
- 10 minHook: three claims on the board, e.g. 'Kids our age hardly sleep', 'It always rains on the weekend', 'Boys have faster reactions'. Vote: true, false or can't tell? What would we need to know?
- 15 minStatistical or not? Sort question cards. 'How many hours did I sleep last night?' has one answer. 'How many hours do students in our class usually sleep on a school night?' expects the answers to vary. That variation is what statisticians study.
- 10 minVariables: sort examples into categorical (groups, like travel mode), discrete (counted, like number of siblings) and continuous (measured, like reaction time).
- 15 minChoose your context and write your own investigative question. Predict the answer and give a reason. Pin predictions to the class board so nobody can change them later.
Session 2 · SOLVE: Organise Information
Plan the data collection
- 10 minPPDAC: meet the cycle statisticians use (Problem, Plan, Data, Analysis, Conclusion). We have a Problem; now we need a Plan.
- 20 minPlan in groups: who or what will you measure, how many, exactly what, in what units, and how will everyone measure it the same way? Write the survey question or measuring method.
- 10 minPilot test: try your question or method on two people. Did they understand it? Did you get the kind of answer you expected? Fix one thing.
- 10 minTohu asks one question about your plan. Improve the plan and set up the recording table.
Getting started
Use the question starter: 'What is the typical ___ for ___?' or 'Do ___ tend to have more/less ___ than ___?'
Stretch
Write a comparison question (two groups, like two classes or two places) and explain why it needs more careful planning than a summary question.
Checkpoint
Each group has a statistical question, a written prediction with a reason, a tested method and a recording table with units.
Activities for this week
- Catch the ruler: reaction-time test: How fast are our reactions, and is our writing hand faster than the other hand?
Useful this week
- Statistical investigations (PPDAC) ↗ How NZ statisticians and students move from a question to a conclusion.
- CensusAtSchool ↗ Real survey data from thousands of NZ students to compare with your class.
- NZ Garden Bird Survey results ↗ National bird-count data to compare with your own count.