It may seem difficult for a caregiver to understand, but many kids are under an immense amount of stress. Expectations at school have only increased over the years, with no sign of slowing down. There are more tests and a higher focus on the future, and there's less time for leisure, physical activity, or art. This really wears anyone down, and especially a child who may or may not have as developed of coping skills as an adult. Stress has risen tremendously due to the global pandemic, and virtual school and other pandemic-related stressors are likely to stay in some fashion long after the pandemic is fully contained.