Webbing and orchestration. Two interrelated views on digital tools in mathematics education

The integration of digital tools in mathematics education is considered both promising and problematic. To deal with this issue, notions of webbing and instrumental orchestration are developed. However, the two seemed to be disconnected, and having different cultural and theoretical roots. In this article, we investigate the distinct and joint journeys of these two theoretical perspectives. Taking some key moments in recent history as points of de- parture, we conclude that the two perspectives share an importance attributed to digital tools, and that initial differences, such as different views on the role of digital tools and the role of the teacher, have become more nuances. The two approaches share future chal- lenges to the organization of teachers'collaborative work and their use of digital resources.Comment: Teaching Mathematics and its Applications (2014) to be complete

Análise cinemática do teste de Thomas e sua influência na função neuromuscular

Projeto de Graduação apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Licenciado em FisioterapiaIntrodução: A Fisioterapia tem vindo a apresentar inúmeros testes para avaliação da flexibilidade e força. O teste Thomas, por exemplo, procura avaliar a flexibilidade do músculo iliopsoas assim como o do reto femoral e o tensor da fáscia lata. Objetivo: Perceber as repercussões cinemáticas da execução do teste de Thomas e sua relação com a função neuromuscular do membro inferior. Metodologia: Análise da cinemática tridimensional do teste de Thomas através do sistema de captura e análise de movimento 3D, Qualisys Oqus Camera Series, e da avaliação da força isocinética da musculatura do joelho. Resultados: Após a análise dos dados obtidos, verificou-se que não existem diferenças estatisticamente significativas entre as variáveis usadas para o estudo. No entanto, encontrou-se uma correlação negativa forte para as variáveis Peak torque 180°/s em flexão (N/M) e Peak torque em flexão/peso corporal (%). Conclusão:.: Existe uma relação estatisticamente significativa entre a posição final da anca do membro estabilizado e da perna em teste.Introduction: In physiotherapy, a considerable number of tests for flexibility and strength is being studied. Thomas test, for example, is used to measure the flexibility of the iliopsoas and range of movement of the hip joint, rectus femoris, and tensor fasciae latae. In the same way, the test can be used to measure shortening muscle of the hip flexion. Objective: Understanding kinematics implications of the Thomas test and its relation with lower limbs neuromuscular function. Methodology: Analysis of threedimensional kinematics of the Thomas test using Qualisys Oqus Camera Series, a capture and 3D motion analysis system, and measurement of isokinetic strengh of the knee by isokinetic dynamometer. Results: After data analysis,there were significant statistical differences between the final knee position of the tested limb and of the stabilized hip. . Conclusion: There is a relation between the final hip position of the stabilized hip and the knee tested.N/

Variations en présence. Le témoin dans les scénographies actuelles des musées de guerre

International audienceRESUME : Nous proposons d'étudier les dispositifs, dans les musées d'histoire des guerres, diffusant par l'image ou par le son des témoignages. Il s'agira de comprendre dans quelles conditions est mis le visiteur pour favoriser son attention ? Nous décortiquerons les dispositifs, et notamment leur place dans l'exposition permanente, avec l'objectif de saisir ce qui se passe dans ces moments particuliers. Autrement dit, quel rapport à l'histoire est mis en place par la mémoire individuelle ? ABSTRACT : CURRENT USE OF IMAGES AND RECORDINGS OF WITNESSES IN WAR MUSEUMS. We propose studying the approaches used in war history museums, which diffuse images or sound recordings of testimonials. Our aim will be to understand the conditions created to capture and retain the visitor's attention. We will carry out a detailed analysis of the approaches, including their position within the permanent exhibition, in order to find out what transpires during these unique moments. In other words, what relationship to history can be created by individual memory? OVERZICHT : BEELDEN EN WOORDEN VAN DE GETUIGEN IN DE HUIDIGE ENSCENERING VAN DE OORLOGSMUSEA Wij stellen voor om in de musea gewijd aan de oorlogsgeschiedenis de voorzieningen te bestuderen die met beeld of klank getuigenissen verspreiden. De bedoeling is om na te gaan in welke omstandigheden de bezoeker wordt gebracht opdat zijn aandacht wordt getrokken. We ontleden de voorzieningen, en met name ook hun plaats in de permanente tentoonstelling, om te begrijpen wat er op die specifieke momenten gebeurt. Met andere woorden: welk verband is er met de geschiedenis die het resultaat is van het individuele geheugen

New technological environments: new constraints, new opportunities for the teacher

International audienceFrench experiments carried out over the last three years on mathematics teaching in complex calculator environments-in particular with TI-92-allow to draw some lessons:-the introduction of this kind of calculators does not simplify the teacher's work, nor the pupils' ;-it requires a new teaching organization of learning space and a new management style of time. We shall argue that, under these conditions, work in complex calculator environments can lead to a transformation of students' relationships to mathematics (giving priority to the creative side of work). Moreover, one can observe a transformation of students' collective relationships to knowledge (giving greater importance to social aspects)

Images en surface, mouvements d’images: Pratique du tuning et transformations esthétiques

International audienceThis article questions the practice of the tuning as the fabrication of a reflexive form for media images. First of all, we study the principles of this practice, to notice that it is the mark of an identification-projection on behalf of the praticing. It is from it that we have then showed that the surface of the bodywork, considered as a screen, acts as support in “the attributes of emulsification of the picture” in reference to Alain Mons. In link with architecture, the transformed car marks its link in the image and makes itself space of representation.Cet article interroge la pratique du tuning comme fabrique d’un espace investi par l’image médiatique. Nous étudions, tout d’abord, les principes de cette pratique pour relever qu’elle est la marque d’une identification-projection de la part des pratiquants. C'est à partir de cela que nous avons ensuite montré que la surface de la carrosserie, considérée comme écran, sert de support aux « propriétés émulsives de l’image » en référence à Alain Mons. En lien avec l’architecture, la voiture transformée marque son lien étroit à l’image et se fait espace de représentation

Renouvellement des ressources et de l'activité des professeurs, renouvellement du regard sur une profession

International audienceLes professeurs, dans leur activité professionnelle, interagissent avec de multiples ressources, numériques en particulier. Nous proposons une approche théorique en didactique, l'approche documentaire, s'appuyant sur l'ergonomie cognitive, pour l'étude du développement professionnel résultant des interactions entre professeurs et ressources. Nous utilisons cette approche pour analyser un dispositif hybride de formation continue, basé sur la conception collective de séquences de classe

Ressources numériques et documentation des professeurs. Un nouveau regard sur conception et usage

International audienceThe paper presents a new theoretical approach of teachers work the work that we call documentational approach of didactics. It illuminates the evolution of teachers practices, resulting from the use of digital resources and from new opportunities of collaboration. This approach is used for analyzing the work of teachers, in and outside the classroom, as well as in the context of teacher education. It helps to situate the role of teachers as key partners in any design process of resources for teaching. The study focuses on mathematics teachers in secondary schools (students 11-18 years), but it is assumed a broader validity of the proposed approach.L'article présente une nouvelle approche théorique du travail des enseignants, que nous nommons approche documentaire du didactique. Celle-ci éclaire les évolutions de la pratique des professeurs, résultant du recours à des ressources numériques sur la Toile et révèle de nouvelles formes de travail collectif. Cette approche est mise à contribution pour analyser le travail des professeurs, en classe et hors classe, ainsi que la conception d'un dispositif de formation continue. Elle permet de resituer la place des professeurs comme partenaires essentiels de tout processus de conception de ressources pour l'enseignement. L'étude est faite dans le cas de professeurs de mathématiques du second degré (élèves de 11 à 18 ans), l'hypothèse est faite d'une validité plus large de l'approche proposée