The paper argues that in order to fulfil the growing expectations teachers face, they need to be equipped with relevant knowledge, capabilities, dispositions, values and skills, such as knowledge and understanding of diversity issues, reflectivity about identities, perspectives and practices, teacher agency and autonomy, empathy, and pedagogical judgement and tact. The paper suggests that responsive teacher education should integrate diversity into the curriculum, approach diversity as an asset, link theory and practice, create spaces for action, reflection, study and anticipation in handling diversity, and incorporate relevant technologies for innovative teaching. Ce document, qui porte sur les enseignants, etudie les roles de ces derniers, leurs fonctions et leurs difficultes en classe face a des eleves d’origines diverses.