Shutting down is a 'freeze' response to cognitive overload. When the visual field is too crowded or the concept is too abstract, the brain shuts down processing to protect the nervous system.
The Science of Struggle
Visual noise and 'splitting attention' are major triggers. By narrowing the focus, we lower the threshold for processing and allow the brain to re-engage.
Expert Insight: Regulation must always precede logic.
Cover the entire worksheet with a plain piece of paper, leaving only one single problem exposed. This removes 'visual flood' and makes the task manageable.