FELLAH HadjiraBEDDAD Djoweyda2026-02-082026-02-082026-02-08https://dspace.univ-tlemcen.dz/handle/112/25682It has become axiomatic that assessments impact powerfully on student learning. This study explore the impact of Formative and summative assessments on effective teaching strategies and student achievement . It articulate the precise ways in which these assessments influence the implementation of effective teaching strategies, ultimately leading to measurable improvements in student achievement .This case study is undertaken Ahmed BEY secondary school with first and second year students, as well as with 32 teachers from Tlemcen city. The data gathered were analyzed quantitatively and qualitatively. The research tools including the questionnaires and classroom observation revealed unbalanced use of assessments in ELT classrooms what pushed to conclude with some practical suggestions to reach better learning outcomes.en: Formative assessmentssummative assessmentsTeaching strategiesELTThesis