Kids are truly damaged from a year of sitting at home. The education Web site Chalkbeat reported in late September, “Schools across the country say they’re seeing an uptick in disruptive behaviors. Some are obvious and visible, like students trashing bathrooms, fighting over social-media posts or running out of classrooms. Others are quieter calls for help, like students putting their head down and refusing to talk.”

Vandalism is off the charts. My sons’ public elementary school in Brooklyn e-mailed that some kids are “engaging in more mischief than usual,” like locking all the bathroom stalls and crushing chalk.

Schools nationwide are reporting kids participating in a “TikTok challenge” that involves them destroying school bathrooms, ripping down soap containers and partitions.

It gets worse. Last week, police in Fresno, Calif., said a 12-year-old boy is facing felony charges after making threatening phone calls to two schools. Pennsylvania’s Woodland Hills HS went back to virtual learning twice due to “credible threats” and fighting among students.