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ICT at key stage 3 (Year 7)
Unit 4: Models - rules and investigations
Section 2: Activity 2
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Objectives |
| Children should learn: |
- that systems can be described by rules
- to describe rules for a system in a standard and structured manner
- to plan the layout of a spreadsheet model
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Activities |
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Outcomes |
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Children: |
- Discuss with pupils how the school tuck shop works,
eg types and level of stock, amount of sales, costs and prices, what consumers look for in such a service, and what factors might have to be considered when running a tuck shop.
- Pool ideas on the purpose and nature of a successful school tuck shop and identify the constraints under which the shop would operate.
- Clarify the purpose behind identifying objectives (or end products), inputs and outputs for a system.
- With the pupils, identify and describe the rules governing the operation of a tuck shop. Present an outline of a model representing the changing inputs, differing constraints/variables that affect the outputs,
eg a rush on an item could create disappointment, a rise in price could affect sales. Finally, explain that one use of the model will be to predict trends and outcomes.
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- describe the rules governing systems
- present the rules describing a system in a structured manner before constructing a computer-based model
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Points to note |
- This activity is conducted away from computers.
- Teachers could provide a prompt sheet for stimulating discussion about the nature and purposes of a school tuck shop, identifying inputs and outputs. Possible tension needs to be identified between purposes of a tuck shop from the pupils' perspective and from the school's perspective.
- Constraints include space, frequency of delivery, choice factors, health factors.
- Explain the reasons for choice of test data for the model.
- Homework could involve designing a model on paper, based on rules in a system.
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This unit is divided into sections. Each section contains a sequence of
activities with related objectives and outcomes. You can view this unit by
moving through the sections or print/download the whole unit.
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