Why is Friday pizza in the bin?
A made-up school canteen cooks 100 pizzas on a Friday and throws many away. The cook asks you to find out why.
The school holds hundreds of files. Most have nothing to do with pizza. How do you pick the few that do?
Key words
| Word | What it means | Example |
|---|---|---|
| Component | One part of a problem that can be looked at on its own. | How many pupils are in school |
| Data source | A place that holds data you could use. | The till log |
| Relevant | Helps to answer the problem. | Cooked and sold counts |
| Appropriate | Right for the job: enough rows, the right type, a usable form. | Four weeks of daily counts |
| Missing value | An empty cell where a value should be. | A salad count with nothing in it |
| Source register | A list of the sources you looked at and what you decided about each. | Use, check or leave out |
The cells students fill in are left blank in this preview.
By the end of this lesson
Note
I can break a problem into parts, find the data sources, judge which are relevant and appropriate, and present my choice.
Starter: what you already know
Have a go
Starter: what you already know
3 questionsYour answers are marked here and are not kept. A college account keeps every student’s marks.
Step 1: break the problem into parts
A big problem is easier as small parts. Ask what could make pizza go to waste.
The cook cooks too many. Fewer pupils come in. Pupils choose something else. A trip takes a year group out. Each part is a component. Each one points to data.
Check: parts of a problem
Have a go
Check: parts of a problem
3 questionsYour answers are marked here and are not kept. A college account keeps every student’s marks.