Web escolar - Título

Web escolar

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Supermarket shopping

Determining the distribution of the first significant figure in the prices for products from the supermarket.

Recipients: From 1st ESO to 4th ESO. Recommended for 3rd ESO.


4-5 class sessions (50-55 minutes per session).


  • To introduce notions of descriptive statistics, as well as the notion of frequency probability.

Didactic content:

  • Data collection and organisation. 
  • Basic notions of descriptive statistics (frequencies and percentages, bar diagram, line diagram).
  • Frequency probability.
  • Benford's Law or the First-Digit Law.
  • Using Google spreadsheet.

Key skills (Spanish Law LOMLOE):

  • Skills in science, technology, engineering, and maths (STEM).
  • Digital skills. (DS).
  • Personal, social, and learning-to-learn skill. (PSLTLS).

Methodology: Working in pairs. Collective work. Discovery activity.

Resources needed: Chromebooks. Google spreadsheet. Projector or interactive monitor. 

Relationship with other subjects: IT. Social Sciences. Economy.