The Zone of Proximal Development (ZPD) is a concept introduced by psychologist Lev Vygotsky. It refers to the range of tasks that a learner can perform with the help of a more knowledgeable person, such as a teacher or peer, but cannot yet accomplish independently. This zone highlights the potential for learning and growth when support is provided. In the ZPD, the learner is challenged just beyond their current abilities, promoting cognitive development. Effective teaching strategies often involve scaffolding, where educators provide temporary support that is gradually removed as the learner gains confidence and skills, ultimately leading to independent mastery of the task.