Cognitivism is a learning theory based on mental processes like thinking, memory, and problem solving. It focuses on exploring the "black box" of the human mind to understand how people learn. Key contributors include Paivio, Gagne, Gardner, and Bloom. The cognitive theory views learning as a change in a learner's mental schemas or representations. Classroom implications for teachers include integrating multiple teaching methods, relating new concepts to prior knowledge, and assessing changes in student cognition. For students, it means demonstrating learning through a variety of higher-order thinking skills and relating new ideas to existing knowledge structures.