Zone of proximal development  The zone of proximal development, often abbreviated as ZPD ("zona blizhaishego razvitiia", in original Russian), is best understood as the zone of the closest, most immediate psychological development of the children that includes a wide range of their emotional, cognitive, and volitional psychological processes. In contemporary educational research and practice, though, it is often interpreted as the distance between what a learner can do without help, and what they can do with support from someone with more knowledge or expertise ("more knowledgeable other"). The concept was introduced, but not fully developed, by psychologist Lev Vygotsky (1896–1934) during the last three years of his life. Vygotsky argued that a child gets involved in a dialogue with the "more knowledgeable other" such as a peer or an adult and gradually, through social interaction and sense-making, develops the ability to solve problems independently and do certain tasks without help. Following Vygotsky, some educators believe that the role of education is to give children experiences that are within their zones of proximal development, thereby encouraging and advancing their individual learning such as skills and strategies. The concept of the zone of proximal development was originally developed by Vygotsky to argue against the use of academic, knowledge-based tests as a means to gauge students' intelligence. He also created ZPD to further develop Jean Piaget's theory of children being lone and autonomous learners. Vygotsky spent a lot of time studying the impact of school instruction on children and noted that children grasp language concepts quite naturally, but that math and writing did not come as naturally. Essentially, he concluded that because these concepts were taught in school settings with unnecessary assessments, they were of more difficulty to learners. Piaget believed that there was a clear distinction between development and teaching. He said that development is a spontaneous process that is initiated and completed by the children, stemming from their own efforts. Piaget was a proponent of independent thinking and critical of the standard teacher-led instruction that was common practice in schools. Alternatively, Vygotsky saw natural, spontaneous development as important, but not all-important. He believed that children would not advance very far if they were left to discover everything on their own. It's crucial for a child's development that they are able to interact with more knowledgeable others. They would not be able to expand on what they know if this wasn't possible. The term more knowledgeable others (MKO) is used to describe someone who has a better understanding or higher ability level than the learner, in reference to the specific task, idea, or concept.