Fashion doesn't "size"
Summary
School level
Generating question
Mathematical territory
Duration
Required material
De 2º a 4º de ESO
How do companies determine sizes? The case of T-shirts
I work with data, variations, ratios, proportionality, percentages, relationships between variables
6 sesiones
Internet access to collect initial data
Motivation
This REI came from an interview on RAC1 with Anna Riera, who had just launched a campaign on change.org protesting the lack of plus sizes in Inditex stores.
A pattern designer also participated who commented on the objective difficulties in making the same dress in very different sizes. I have simplified the inquiry in the case of shirts to work only with two variables: the width and the height.
The variation that appears when comparing the sizes between different brands always impresses the students a lot.
At the end, it can be proposed that they design their own T-shirt brands, choosing some type of increase that they consider appropriate.
Trabajo en el aula
Trabajo con datos, variaciones, razones, proporcionalidad, porcentajes, relaciones entre variables
Planning
Phase
1
We present the generating question
2
First explorations
3
We organize the data
4
We study the variation
5
Featured observations
6
We create our brand
Central questions
Podcast by Anna Riera and the size problem
We are looking for data on the measurements of shirts in different brands
How to collect the data of the different brands? What are we starting to observe?
Study by brands (variations by sizes) and by sizes (variations by brands)
We identify types of increases, we relate it to the shape of the shirt
We make a reasoned proposal for an increase