PN6: Cognitive Load

Practice Note 6 addresses a common higher education challenge: lecturing through dense slides and extensive content that leaves students struggling to keep up. The root issue is not a lack of student motivation, but rather the hard limits of working memory, which can only process roughly four chunks of information simultaneously. When this threshold is exceeded, cognitive processing breaks down and learning fails to occur.
Effective teaching requires instructors to minimize extraneous load to protect germane load. Note outlines five practical classroom strategies to achieve this balance: presenting only one idea per slide, placing explanatory text directly beside diagrams, narrating to visuals instead of text, utilizing worked examples before independent practice, and incorporating periodic consolidation pauses.

To implement these concepts immediately, educators are encouraged to audit a single dense slide by cutting it down to one key visual and concept, fix split-attention issues by integrating text labels directly into diagrams, and introduce a brief pause after 20 minutes of content for students to write a one-sentence summary. Ultimately, reducing presentation density creates the necessary conditions for deeper learning.