#### Description

Can we learn numbers and math operations in a more intuitive way?

+-· : numblers is a numerals system that helps children aged between 5 and 7 to get *number sense*; understand the properties and operations with numbers in a physical and visual way. In order to make it more fun a board game is included so that it is not limited to its use as a support material in classrooms. It has been designed so that it can be easily downloaded from the Internet. It can also be printed at very low cost since it just needs a little bit of black ink and colored A4 paper. It is distributed through a Creative Commons License.

#### Award

+-·: numblers. Awarded first prize in the International Contest Science on Stage (Hispanic Countries and Portugal) organized by CSIC (High Council for Scientific Research), ICMAT (Mathematical Science Institute), RSEF (Royal Spanish Physics Society) and UNED (National Distance Learning University). 2013.

#### Opportunity & process

I asked myself if I could fnd a simple way to make him “see” what he was doing.

This project started as I observed how my son was learning numbers in school. I was astonished to realize that he was learning very much the same way I learnt many years ago; same difculties, same limitations and same misunderstandings. To begin with, he was learning to count by heart; not really understanding what he was doing and, of course, not knowing what counting was for. He did not understand what number was bigger and did not grasp the notion of successor. Tings got a bit worse when he started to learn how to add / subtract numbers. He was learning the operations, counted with his fngers and had difculties getting what it was for as soon as the problems demanded some extra thinking and were not a straightforward addition / subtraction operation. I began to think if I could fnd a simple way to make him “see” what he was doing.
Click here for more information about the process.

#### Video presentation of the solution