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 attention to intrinsic and germane loads. Intrinsic load is the inherent difficulty of the material itself, while germane load involves the processes of schema construction and automation. Research has shown that poorly designed materials, such as those with redundant information or split-attention effects, can overload working memory, hindering comprehension. Conversely, well-structured materials that integrate visual and verbal information can facilitate learning by reducing unnecessary demands on the learner. Therefore, educators are encouraged to consider these principles when developing curricula to optimize educational outcomes.