Final answer:
Falls, particularly among young children, adolescents, and the elderly, are the most common cause of injuries at school.
Step-by-step explanation:
The most common cause of injuries that occur at school is falls, particularly among young children, adolescents, and the elderly. According to the Centers for Disease Control and Prevention (CDC), about 30% of all injury-related deaths in the United States are caused by head injuries, which are often caused by falls. Other causes of injuries at school include automobile and motorcycle accidents.