This article is interesting in the used ostensive forms by two Physical Education (PE) teachers. "Swimming" is the concerned activity. Its objective is to analyse combination moments of physical ostension to verbal ostension, and to reveal that this combination is a professorial action. The research methodology is qualitative. It is enrolled in the field of clinic didactic interactions of PE and on the clinic analysis of teaching practices of expert teachers and beginners and to perceive "the case by case" and the singular subject (Terrisse, 1999). The collection and data analysis are inscribed within one time constructed or established temporality of the professorial action: the test (Terrisse, 2000) relying on the knowledge ostension scale (Robert, 2012). Results show that the combination between teacher's ostensive forms is a professorial gesture in swimming.

This article is interesting in describing and analyzing the joint didactic activity of two teacher's with their students in swimming in Tunisia. Its objective is to determine the influence of the teacher's training and their experience in staging and in the regulation of the didactic situations. To clarify better the complexity of the observed reality, this study uses "ordinary didactics"

Résumé : Cet article s'intéresse aux pratiques ostensives de deux enseignants d'Education (Robert, 2012 ;Salin, 2002

Cette recherche s'intéresse aux pratiques ostensives de deux enseignants d'Education Physique et Sportive (EPS) dans l'activité natation en Tunisie. Son but est d'analyser les formes ostensives et de dégager leurs effets sur le rapport au savoir. La méthodologie de cette recherche est qualitative. Elle s'inscrit dans le cadre scientifique de la didactique clinique de l'EPS et sur l'analyse clinique des pratiques enseignantes des enseignants expérimentés et débutants afin d'entrevoir « le cas par cas » et le sujet singulier (Terrisse, 1999). Les situations didactiques ont été décrites à partir de l'enregistrement audio et vidéo de séances et de données d'entretiens. Le recueil et l'analyse de données s'inscrivent dans une temporalité construite en un seul temps de l'action professorale : l'épreuve (Terrisse, 2000). Nous faisons le choix de nous focaliser sur l'échelle des ostensions des savoirs (Robert, 2012). L'analyse de l'épreuve nous a permis de constater que ces deux enseignants mettent en scène leur propre rapport au savoir dans les situations d'enseignements qu'ils proposent à leurs étudiants, mais chacun avec son degré d'expérience personnelle. Ces résultats mettent en évidence que la forme d'ostension utilisée par l'enseignant d'EPS est révélatrice du rapport au savoir en natation.

Higher education is a contract between professor and student; which specifies what each pole can expect from the other (Johnson, 1995). The strategies, techniques and devices used by teachers to achieve their personal, scientific and technical purposes during their lessons are the subject of various researches in didactics. This research is in line with the scientific orientation of clinical didactics, which is characterized by a double theoretical and epistemological affiliation: didactics and clinical psychoanalytic inspiration. We are interested in the singularity of the subject teachers taken in didactics. In Tunisia, most higher education teachers do not have professional and continuous education in pedagogy and didactics, and no follow-up in their careers. As if the question did not arise and the ability to accompany students, to develop their critical thinking skills and to promote their learning was selfEuropean Journal of Educational Sciences, EJES September 2017 edition Vol.4, No.3 ISSN 1857-6036 75 evident. The aim of this work is to insist on the importance of continuing education and professional development of experienced university teachers.