”Trade and equations”Inspired by the Greek movie: ”The Concursante”(The Contestant), by Rodrigo Cortes, from 2007

Presented by Ulla Lambek, DK

Teaching methodUsing 1. Relate mathematics to real life2. Modelling – use your hands and concrete items3. Communication and cooperation – pass on your ideas and the way you

understand/solve the problem.4. Innovation – create your own equations5. Using ICT – Geogebra6. Using pen and paper to solve the equations7. Teaching indoor and outdoor8. Physical activity

In ancient time people exchanged natural products, but it was a problem to trade when people wanted to buy things of maybe higher value. It must also have been a problem to sell all the crop in the summertime, if you did not want to exchange the crop into something the other person had. Having things of value which could be kept and stored arised. Natural products were exchanged and a need of keeping/saving value made people develop coins, security and bank notes.

The students work in teams- each teammember has a colour

Laminated template to illustrate the method for the students – on the back side there is an empty template.

The students make ”simple equations” for each other on a template using concrete items.

The students rotate among the tables. The students having the red colour stay.

The new team members solve the problem – the red member has the solution. A new equation is built and the blue members stay at the table…

Laminated template to illustrate the method for the students – on the back side there is an empty template.

The students make ”two equations with two unknown” for each other on a template using concrete items.

The students rotate among the tables. The students having the red colour stay.

The new team members solve the problem – the red member has the solution. A new equation is built and the blue members stay at the table…

Solving the problem using ICT

Solving the problem with pen and paper