(a) The school closure group included more children who had experienced an increase in time spent with family and siblings than the school reopening group. Few children spent more time with their fathers and there was no change in time spent alone. Time spent playing with friends decreased, and many were not in contact with their friends at all in the school closure group. (b) The school closure group included more children who were staying up later at night, had more difficulty getting up in the morning, and whose hours of sleep had increased than the school reopening group. More children in the school closure group had skipped breakfast, fewer ate three meals per day, experienced an increase in time spent watching TV or DVDs, playing video games or on the Internet, and watching news about COVID‐19. This group included more children who experienced a decrease in time spent studying and time devoted to physical activity. (■), school closure group; (), school reopening group.