Résumé:
This  article  aims  at  helping  teachers  make  effective  use  of  language  portfolios  in an  EFL/ESL  context.  This  is  through  proposing  and  making  clear  the  steps  of  integrating them into their teaching and the way learners’ training into their use needs to be conducted to  promote  their  reflective  and  autonomous  learning.  These  range  from  identifying  the students’ readiness to autonomous learning to teachers’ assessment of students’ portfolios and their evaluation of this process. It is worth noting here that, this training process is being carried  out  on  a  sample  of  undergraduate  students  at  the  department  of  English  of Abdelhamid Ibn Badis University of Mostaganem, Algeria.