The application SDM 2019 allows the setting up of a contest of riddles within a school (primary school or college), for the week of mathematics, from March 11 to 15, 2019.

- The participants (pupils, parents, adults of the establishment) download the application;
- The referent teacher of the action indicates the address (es) mail (s) to use to send the answers;
- every day from March 11th, a new enigma is unlocked: each of the 5 enigmas is divided into three levels of difficulty, allowing the participation of a maximum of individuals. The participants work directly in the application, then generate an image of the response to propose, which then simply send to the email address indicated before.
- the referent teacher then counts the answers according to the level of difficulty and establishes a ranking.
- A final round can be considered to decide the ex-aequo!

More information on the mathematical site of the academy of Dijon: http://mathematiques.ac-dijon.fr/spip.php?article246