The present study aimed at investigating the use of a performance-based learning program (PBL) for enhancing EFL professional diploma students ' assessment literacy skills at the Faculty of Education. The study adopted a pre-post group design. The study sample was twenty five students. The whole group was submitted to an intensive training in PBL program. The instruments of the study included a needs assessment questionnaire, a checklist to determine the Assessment Literacy (AL) domains and their sub skills most needed by EFL prospective teachers, and a pre-post assessment literacy test. Analysis of data obtained by students (using t- test) revealed that the PBL program was so efficient and effective in promoting EFL professional diploma students' literacy skills in the post-performance of the test. Discussion of these findings, recommendations and suggestions for further research are presented.