Final answer:
When recording a child's results from the peak expiratory flow meter, the parent should record the highest value achieved.
Step-by-step explanation:
When recording a child's results from the peak expiratory flow meter, the parent should record the highest value achieved. This value indicates the maximum airflow that the child is able to exhale forcefully in one breath. It is an important measure of the child's lung function and can be used to monitor changes over time.