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, thereby freeing resources for intrinsic and germane processing. Intrinsic load relates to the complexity of the material itself, while germane load involves the processes of schema construction and automation. Researchers have found that poorly designed presentations, such as those with redundant information or split-attention effects, can unnecessarily increase extraneous load, hindering comprehension. Conversely, well-structured formats, like using integrated diagrams and concise text, can enhance learning outcomes by reducing unnecessary mental demands. This theory has significant implications for curriculum design and multimedia learning, emphasizing the need to align instructional methods with human cognitive architecture.