Academic achievement in primary schools usually confirm the supremacy of girls, except in scientific areas. Most results highlight the influence of the social context, the teaching methods or the psychological parameters. From the “internal” point of view, especially the analysis of the influence of academic factors, the items in mathematics and the nature of pupils answers potentially contribute to the explanation of gender performance in primary schools. According to the results of two standardized examinations on a sample of 2000 pupils, the qualitative approach reveal best scores and procedures among girls. This could lead to the conclusion that the fact of facing of difficulties in mathematics allow girls to make better progressions than boys. In addition, these progressions suggest a non gender discriminated impact of teaching methods.