The concept of 'cognitive load' refers to the total amount of mental effort being used in the working memory. In educational psychology, cognitive load theory suggests that learning is most effective when instructional materials are designed to minimize extraneous cognitive load, allowing learners to devote their full mental capacity to intrinsic and germane loads. Intrinsic load is inherent to the complexity of the material itself, while germane load involves the processes of schema construction and automation. Researchers argue that poorly designed multimedia presentations, which split attention between related sources of information, unnecessarily increase extraneous load, thereby hindering deep understanding. Conversely, well-structured materials that integrate text and visuals can reduce this unnecessary burden, facilitating more efficient learning. Thus, the theory has profound implications for curriculum design and the development of digital learning tools, emphasizing the need to align instructional methods with human cognitive architecture.