The thrust of this paper is to explain the theoretical concept of memory as it affects our ability to learn, store and retrieve information. The three main processes of memory and their functions were adequately elaborated. Another important question for the teacher is why do students forget? The fact that material has been learnt is meaningless if the student is unable to recall what he has learnt. The major reasons why students forget was critically examined. Similarly, procedures that will help the teacher to promote remembering among students were outlined. Finally, a conclusion and recommendations were provided.