Tawfeek Ahmed Meray and Mohamed Mahmoud El-Heela (2007) defines mastery learning as "a set of various educational ideas and practices and a collection of teaching and assessment methods that aims at improving the education provided to learners in order to allow all or the majority of them to reach a level of mastery of the educational material. They also indicate that mastery learning requires the use of small educational modules organized in a consecutive order with specific goals andthrough different levels of performance, initial collective teaching, formative and composite tests as well as individual and collective corrections.''