New study on cognitive load shows it's not a single, stable thing that students carry through a lesson. It rises, falls, peaks, and interacts with motivation.
To truly diagnose learning bottlenecks,teachers should check for understanding and difficulty during the specific moments when new or complex content is introduced.
This *might* mean exit tickets are an innacurate measure: students rewrite the history of the lesson based on the peak intensity or the ending, often ignoring the struggle in the middle.
Essentially, the mean value of cognitive load across a task is a poor representation of the learner's actual experience.
link.springer.com/article/10…