International audienceAfter several years of video acquiring and analysis, this paper gives a synthetic view on the different tasks that appear in sessions blending history and mathematics. Based on a typology summarized by the acronym SaMaH (Specific, a-Mathematical and a-Historical tasks), this first reading grid enables the identification of the respective contributions of mathematics and history in a given school activity. This framework also makes visible the particular specific tasks in which the two fields are involved. Then, the analysis of different forms of specific tasks will lead to a new a gradation between H-weak and M-weak sub-domains. This paper mainly gives a quick view on the most important theoretical results at this time only available in author's French publications.</p
