There are many evaluations of the work of Vygotsky and Jean Piaget during their lifetime and in their death. Many of their theories went beyond what they expected, I'm sure, for them too. Teachers, researchers, and parents use their theories of child development, social development, and other theories in their lives. Whether it's work or parenting, it's essential to know about these two philosophers and what they believed to be real. Piaget is said to be the founder of cognitive development, he changed the field of developmental psychology and thanks to him we no longer discuss strategies, behaviors and representations governed by rules, but we talk a lot about the generalization of stimuli, mental age, conditioning and training set. To a large extent, Piaget changed the idea of ​​psychology by asking new questions that seem to have led psychologists to view development through Piaget's eyes (Flavell, 1996). Piaget's theory of cognitive development is a theory that contains a mountain of information. on the development of human intelligence developed by Piaget. Although this theory is known as developmental stage theory, much of it deals with the nature of something we posit which is knowledge. But Piaget is not only talking about the wonders of knowledge, but also about how humans manage to acquire and construct it as well. Piaget believes that cognitive development is central to the human organism and that language depends on cognitive development. Piaget's model of cognitive development helps us understand the cognitive growth, active and constructive nature of the child. The model provides insight into the process of change in cognitive development. Due to Piaget's theory, many believe that...... middle of article...... ugh, I never thought I would hear myself say that, I'm curious what kind of knowledge the children and educators of the future will draw from these theories to those who have found them. Works cited1. Donato, R. and McCormick, D. (1994). A sociocultural perspective on language learning strategies: the role of mediation. Journal of Modern Languages, 78(4), 453-464. doi:10.2307/3285842. Flavell, J. H. (1996). Piaget's legacy. Psychological Science, 7(4), 200-203. doi:10.1111/j.1467 9280.1996.tb00359.x3. Kravtsova, E.E. (2009). The historical-cultural foundations of the zone of proximal development. Journal of Russian and East European Psychology, 47(6), 9-24. doi:10.2753/RPO1061-04054706014. Mahn, H. (1999). Vygotsky's methodological contribution to sociocultural theory. Remedial and Special Education, 20(6), 341-350. do I:10.1177/074193259902000607