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		<property:Introduction rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Fichiers à télécharger sur ce lien https://tiers-lieux.univ-rennes.fr/projets/urne-de-brousseau-revisitee


Projet porté par '''Naim Benzebiba,''' Professeur de mathématiques au Collège Bellevue de Beausoleil, pour permettre aux élèves d'expérimenter l'aléa, d'observer la stabilisation d'une fréquence et d'introduire la notion de probabilité. Le dispositif peut être utilisé dès le cycle 3 (CM1).


Il a été imaginé dans le cadre de l'événement '''Fabrikathon 2025''' au '''Mathémarium''' de Nice qui réunissait chercheurs et enseignants du second degré autour de la conception et de la fabrication d'objets mathématiques pédagogiques destinés à l'usage en classe. https://mathemarium.fr/Fabrikathon-Pedagogique.html</property:Introduction>
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vis et boulons 3 mm</property:Material>
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		<property:Step_Content rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Faire tourner l'urne sur son axe

Une bille se coince quand elle est tournée vers le bas, noter sa couleur

Recommencer plusieurs fois

La fréquence d'apparition de la couleur jaune permet d'estimer avec une règle de trois le nombre de billes de couleur jaune</property:Step_Content>
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		<property:Step_Title rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Fermer la boite et poser sur le support</property:Step_Title>
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