The teachers beliefs about teaching and learning profoundly shape their practice influencing evry thing from class room management to curriculum choices ,thèse beliefs often formed early in their own éducation are a central référence point for teachers and can be résistent to change through New successful practices can lead their evolution .Key beliefs include the Idea that all students can learn the purpose of éducation because a teachers beliefs in student's ability derictly impacts that student's performance,high expectation can lead to greater academic achèvement while négative beliefs can destroy it.