Abu Mady, Mona2019-11-102019-11-102019-0920174174https://bspace.buid.ac.ae/handle/1234/1512Human development theories pursue to figure out how and why children change and develop over time. Human development theories present the framework to allow the educators to understand, explain and predict children’s’ behavior. Throughout history, there have been many theories that explain child development. This study focuses on two significant theories, Piaget’s cognitive development theories, and Vygotsky’s sociocultural theory. The study covered broadly many aspects of these two theories. Their main points and their strategies have been discussed in deep. The study aims to evaluate the application of the strategies of each theory in the classroom. The study conducted in a US curriculum private school in Dubai. Mixed methods of both qualitative and quantitative instruments have been used. Three different teachers have been observed and interviewed to evaluate the implication of the strategies of each theory during the teaching and learning process. Then the findings have been analysed and compared to reach a conclusion. According to this analysis a deep and practical comparison occurred between the two theories. Where some of the teachers tend to Piaget’s cognitive theory and some tend to Vygotsky, while others believe that applying the strategies of the two theories in parallel to each other, is a must. Both theories play a significant role in human development. Educators should shift from the old traditional learning process to the new cognitive learning process.encognitive developmental theoriesteaching and learning processUS curriculumUnited Arab Emirates (UAE)human developmentchild developmentDissertation