This theoretical paper reviews the major theories and models of learning and views them in the light of two major psychological perspectives of learning; behaviorist and constructivist. The educational process has become the dominant response to challenges in all the domains of modern life. The key to a good primary education is the quality of its teachers. Quality education enables people to develop all of their attributes and skills in order to achieve their potential as human beings and members of society. A deeper understanding of the students’ behavior enables the teacher to help guide them through the educational process. Understanding development, or the long-term changes in growth, behavior, and knowledge, helps teachers to hold appropriate expectations for students as well as to keep students’ individual diversity in perspective. From kindergarten through the end of high school, students double their height, triple their weight, experience the social and hormonal effects of puberty, and improve basic motor skills.