Lesson Plan

• Describe the main quantitative methods used to measure business size.
• Explain at least five common problems that affect the reliability of size measurements.
• Evaluate strategies to mitigate measurement problems when comparing businesses.
• Apply a simple inflation‑adjustment calculation to turnover figures.
• Analyse a case study to identify misleading size indicators.

• Projector and screen
• Whiteboard and markers
• Printed handout of measurement methods table
• Worksheet with a short case study
• Calculators (or spreadsheet on laptops)
• Sticky notes for exit tickets

Begin with a quick poll: “What makes a business ‘big’?” Connect responses to prior knowledge of turnover and profit. Explain that today’s success criteria are to identify measurement problems and suggest realistic ways to overcome them.

1. Do‑now (5') – Students write three ways to measure business size on sticky notes.
2. Mini‑lecture (10') – Present the six quantitative methods using a slide and discuss their typical units.
3. Group activity (12') – In pairs, analyse the provided case study, flagging any measurement problems.
4. Whole‑class debrief (8') – Groups share findings; teacher highlights each problem and links to mitigation strategies.
5. Quick calculation (5') – Students adjust a given turnover figure for inflation using the formula shown.
6. Exit‑ticket quiz (5') – Three rapid‑fire questions on methods, problems, and mitigations.

Summarise that measuring business size is useful but fraught with pitfalls that require careful adjustment and contextual understanding. Collect exit tickets as a retrieval check and assign homework: research a real company and write a brief paragraph outlining which size measure best reflects its market position and why.