1. Jerome Bruner was an American psychologist who developed theories of cognitive development and learning known as the cognitive theory. 2. Bruner believed that learning involves three stages - enactive, iconic, and symbolic - which correspond to development in how children process and represent information. 3. Key aspects of Bruner's theory included the concepts of scaffolding, spiral curriculum, and discovery learning - which emphasized facilitating active learning through temporary support, revisiting topics at increasing complexity, and allowing students to discover relationships in information respectively. 4. Overall, Bruner argued that education should focus on developing students' problem-solving skills and autonomous learning abilities rather than simply imparting knowledge.